1. P. Cederqvist. CVS--concurrent versions system. Available from http://ximbiot.com/cvs/manual/cvs-1.11.22/cvs.html 2006.]] P. Cederqvist. CVS--concurrent versions system. Available from http://ximbiot.com/cvs/manual/cvs-1.11.22/cvs.html 2006.]]
2. B. Collins-Sussman B. W. Fitzpatrick and C. M. Pilato. Version Control with Subversion. O'Reilly 2004.]] B. Collins-Sussman B. W. Fitzpatrick and C. M. Pilato. Version Control with Subversion. O'Reilly 2004.]]