Riznyk, Oleg     The use of filters is for processing of images on the basis of ideal ring [Текст] / Oleg Riznyk, Yurij Kynash, Irina Yurchak, Mykola Petrechkiv // Perspective technologies and methods in MEMS design : proc. of IXth Intern. conf., 16-20 Apr. 2013, Polyana, Ukraine / Lviv Polytechn. Nat. Univ. — Lviv : Lviv Polytechnic Publ. House, 2013. — P. 133-134.