Giuseppe Bianchi M. Bonola Vincenzo Falletta Francesco Saverio Proto Simone Teofili The SPARTA pseudonym and authorization system. 23-33 2008 74 Sci. Comput. Program. 1-2 http://dx.doi.org/10.1016/j.scico.2008.09.010 db/journals/scp/scp74.html#BianchiBFPT08