I am not familiar if there exists any software for this proces. As I have done it:
Backward snowballing: Check the reference lists of the included articles.
Forward snowballing: Copy the title of the included article and use Web of Science and/or Scopus to find cited articles.
You can also use the function in Pubmed called related/similar articles to find papers on the same subject.
Snowballing sampling is some how a recruitment method. It often used where the population under the study is HARD to get. I dont think there is a software for this type of sampling and the only way upon my knowledge for backward one is the literature while for the forward the most appropriate method is through communication with one of the members or allowing a private social media communication to get others.
What I am doing right now,
Forward Snowballing: Paste your title in the Google Scholar search, and click on the cited link. Retrieve the list using Mendeley.
Backward Snowballing: I'm using Scholarcy. Upload your documents to that software. Then, click on a single entry and scroll down till the end. You can download the list of citations there.
Once you populate all the citations (better make folders inside the citation manager for this work), you need to update the details and follow your inclusive and exclusive SLR protocol within the citation manager.
I'd prefer mass populate the backward and forward snowballing first, then make a decision using Rayyan. Rather than go through the citation one by one.
Be aware that they have TOS you need to follow if using Google Scholar search to avoid being blocked by them.
Hope it helps :)
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