Vasyliuk, Jaroslav     Ontrological models based on mereology, topology and theoretical data [Текст] / Jaroslav Vasyliuk, Vasyl Teslyuk, Andriy Zelinskyy // CAD in machinery design - implementation and educational issues CADMD 2013 : proc. of the XXI Pol.-ukr. conf., Okt. 11-12, 2013, Lancut, Poland / Warsaw. Univ. of Technology, Lviv Politechniс Nat. Univ. — Warsaw, 2013. — P. 51-52.