Marshall, Gil. (2005). Critiquing a research article. Radiography 11(1).
Conkin, D. J. (2005). Critiquing research for use in practice. Journal of Pediatric Health Care 19(3).
Beck, C.T. (2009). Critiquing qualitative research. AORN 90(4).
A search in ScienceDirect for "critique research" or something along those lines seems to bring up results. Still not sure exactly if this is what's expected of the assignment, but if you get the question....