@inproceedings { 310, title = {An empirical study of Requirements Model understanding: Use Case vs. Tropos models}, journal = {25th ACM Symposium on Applied Computing }, year = {2010}, author = {Hadar, I. and Reinhartz-Berger, I. and Kuflik, T. and Perini, A. and Ricca, F. and Susi, A.} }