Dear Lubka, It is not actually required, but we enjoy seeing how Chimera is used. The "citing Chimera" page suggests you could mail the reference to chimera@cgl.ucsf.edu but you could just reply to this message to send it to me ( meng@cgl.ucsf.edu ) if you want. Thanks! Elaine ----- Elaine C. Meng, Ph.D. UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab Department of Pharmaceutical Chemistry University of California, San Francisco On Jan 6, 2010, at 6:55 AM, Lubka roumenina wrote:

Dear all, I have recently published a paper, where one of the figures is created using Chimera. I remember seeing in your website that we have to send such publications to Chimera team. Please give me the correct e-mail so that I can attach the PDF. Thank you very much in advance and thanks for creating such nice software! Lubka