How to cite from a .ris file

ris is not a currently supported data type according to the manual. The two supported types are bibtex and biblatexml. See page 77 of the current manual.

I convert ris to xml using ris2xml and then convert the result to bibtex using xml2bib. For example,

ris2xml "<filename>.ris" | xml2bib -b > "<filename>.bib"

where <filename> is the base file name. These instructions assume a Unix-ish system, obviously, but there may be something similar for other platforms.