Nedostup, Leonid     Research of accuracy of guaranteed operayting time prediction by fractile zones method [Текст] / Leonid Nedostup, Myroslav Kiselychnyk, Pavlo Zayarnyuk // Artificial intelligence driven solutions to business and engineering problems / ed. by G. Setlak , M. Alexandrov, K. Markov. — Rzeszow - Sofia : ITHEA, 2012. — P. 148-158.