Advances in Databases and Information Systems Second East European Symposium, ADBIS '98, Poznan, Poland, September 7-10, 1998, Proceedings - Litwin, Witold; Litwin, Witold; Morzy, Tadeusz; Morzy, Tadeusz; Vossen, Gottfried; Vossen, Gottfried (Springer Berlin Heidelberg : Imprint: Springer, 1998)