@inproceedings {MCM-MSWiM-01, title = {Performance Analysis of Internet Based Software Retrieval Systems Using Petri Nets}, year = {2001}, month = {7}, pages = {47-56}, publisher = {ACM}, organization = {ACM}, author = {Jos{\'e} Merseguer and J. Campos and E. Mena}, editor = {M. Meo and T. Dahlberg and L. Donatiello} }