Pattern recognition and information processing (PRIP '97): proceedings of the Fourth International Conference, 20―22 May 1997, Minsk, Republic of Belarus / [edited by V. Krasnoproshin [et al.]. - Minsk : BSU, 1997 - "Распознавание образов и обработка информации", международная конференция (4; 1997; Минск) (BSU, 1997)