Vasilecas O. Information Systems Development Advances in Theory, Practice, and Education / / edited by Olegas Vasilecas, Wita Wojtkowski, Jože Zupančič, Albertas Caplinskas, W. Gregory Wojtkowski, Stanisław Wrycza. // Springer e-books. URL: http://dx.doi.org/10.1007/0-387-28809-0