3 or 6 months.

I think that the relevant scientific sources published within ten years are the best, but references classified as scientific books do not have a specific date.

There is practically no limit. It varies from case to case.

If you want to perform any experiment on estimation of protein from body fluids, you have to name Lowry et al (1951). For tissue section and staining, Luna (1968), antibacterial drug testing on bacteria Buer et al (1966) like that.

In spite of several modifications, basic procedures of some research deserve referencing, particularly in the thesises of Ph D.

Thanks.

hope this link is useful

https://patthomson.net/.../the-literature-review-how-old-are-the-sourc...

regards

Dear

In any conditions our research can be not publicate all you life : is it need that the years for presented this study.

Thanks for you ?

Best regards

Agree with Shibabrata Pattanayak

regards

Good question and valuable responses.

Generally, the newer is better, however, there must still need for legacy references may be decades ago. An interesting example about that: A major reference in computer science for core algorithms is the Knuth's (The art of computer programming). This great reference depends as a reference on an algorithm from B.C.era which is [The Chinese remainder theorem].

In Ukraine, the work of a scientist is assessed by publications for the last 5 years. A literary analysis of recent advances in science is allowed over the past 10 years, but it is better if we analyze newer sources

I think research has to be assessed in totality. All related work need to be evaluated.

However to assess whether a researcher continues to be active in research, previous five years research contribution as well as ongoing research work needs to be given due importance .

Interesting question... following.

Thanks all

It depends on the nature and type of study. Some times we have to pick up very old study just to complete the chronological order.

In case of empirical studies, we must not cite very old study.

I think as such there is no time limit. If your study has some relevance then it can be published anytime.

Research need to be evaluated in terms of value of researth projects obtained and completed .

One may need to look at desired benefits achieved.

Research needs to be in contemporary area as well as for benefit of the mankind.

I think so that there are no limits indeed. Some "historical papers" are very very interesting and inspiring. We must only get them and read patiently :-)

It depends on a variety of factors, I think. I've been a member of some thesis committees wherein the institution required that references all be within the last five years. I've worked in other places where there was no time limit. In some cases, I was also to 'just use common sense.' So, I think it varies.

There is practically no limit. It varies from case to case and It depends on a variety of factors.

No such limit exist or even given in any journal instruction. But generally 10yrs older references can be taken up

I follow the answers

It was recommended to me to not reference material older than 10 years. However, I think it is important to look at all relevant material no matter how old, just be aware that the research may have moved on or advanced, but for gaining a thorough understanding, we must consider all research.

Like the famous quote: "If I have seen further it is by standing on the shoulders of Giants"

We're not going to disregard the great work of Issac Newton.

Depending upon the topic/ type of investigation, and availability of previous literature. So some times it may vary...

If a particular person hopes to remain in academic field or a related profession, publishing research work is essential. Sooner is better, otherwise there is a possibility of getting your findings out of date.

It depends on the subject. Latest research and findings (maybe last 10 years) should always be included in any case study. However, the classical papers can never be neglected that provide the baseline information.

No limit please. But more emphasis should be on current or very recent works

There Is no limit, but continous work and paper publishing Is advisable.

I agree with Dr Ashok Pundir and Dr. Dmytro Leshchenko,

Best regards

I also I think so that there are no limits indeed because some papers are very interesting and inspiring.

Should we stop citing Netwon’s Laws or Einstein‘s theories because they are too old?

Generally, there is no particular limit for that. However, the latest works of literature are too important to be used.

Interesting question, I am following

This is an interesting topic, some journals require using papers published in the last 5 years. While it may be important to include recently published articles in your research, I do not think specifying such a time limit is justifiable, since you may have many key relevant papers that may have been published well beyond such a time frame. I think papers should be included based on merit and relevance, and not date of publication.

Hello Sir

From my simple experience of reading articles and attending M Sc and PhD theses exams, most agree about 5-10 years of related publications.

Best regards.

Good question

I think, there is no time limit for publications

It depends on the type of study. But since some journal publication requires recent related studies i think 5 to 10 years are best to be considered.

It depends on type&nature of studies,there is no time limit for publication,in our speciality in dentistry in measuring plaque,gingival&calculus indices,we depend on loe&Silness indices(1963,1964),bec.they r the founders of these indices,they constructed the corner stone of studying plaque,gingivitis&periodontal diseases.cont.

They’re regarded as Key relevant referrence bec.they provided us with baseline information,so in term of related studies should not be based on date of publications

Dr.Amir W.Al-Khafaji gave an excellent example about Newton so i fully agree with his concept.

it depend upon the type of data. when you are comparing the data , new data are more important and when you are quoting the sequence of event older data are also important.

In any case, the important thing is to follow the criteria of the places where you want to publish your research: there are journals that ask not to exceed 5 years, other 7. Craig Refugio