If you are doing a proper research report, you need those articles *before* you write your paper; otherwise, how do you know what to write about? I’ve done many of these in the past, and most demanded a lot of time at the library.

I found some websites that may be helpful for you. (remove all spaces from these links)

http://www.eric.ed.gov/ ERICWebPortal/custom/ portlets/recordDetails/ detailmini.jsp?_nfpb= true&_&ERICExtSearch _SearchValue_0= EJ682225&ERICExtSearch _SearchType_0=eric_ accno&accno=EJ682225

http:// findarticles.com/p/ articles/mi_m1145/ is_n11_v31/ai_18944634

http:// scholar.google.com/ scholar?q=performance +appraisal+articles&hl =en&lr=

Good luck!