Stakhiv, Petro     The impact of calculation precision on the process of mathematical model construction with the use of optimization [Текст] / Petro Stakhiv, L. ByczkowskaLipinska, Yuriy Kozak // Computational problems of electrical engineering : 13 Intern. workshop, Grybow, Poland, Sept. 5-8, 2012 : book of abstr. / Warsaw Univ. of Tecnhology, Lviv Polytechhic Nat. Univ., Tech. Univ., of Lodz, Univ. of West Bohemia, Warsaw Univ. of Life Sciences. — [S. l.], 2012. — P. 49.