I'm wading into the unfamiliar area of bibliometrics at the moment.
I'm conducting a study of terminology over the last few decades, and want to account for article impact. A quick and dirty way would be to look at the number of citations, however I'm concerned about the correlation of citation and age. for example, I would not expect a 20-year-old paper with 10 cites to have the same impact as a 5-year-old paper with the same number of cites. Instinctively, I would simply divide cites by age, but would prefer to have some support for my method.
Additionally, I know there are services out there that catalog use beyond citation, but keep in mind I'm going back to the 1980s or earlier.
The standard way of doing this is working with a fixed citation window, e.g. counting citations in the five years after publication. You wold also need to field-normalise citations because citation practices are field-specific. And so on.
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