Vanko, Volodymyr     New possibilities of monitoring electric power quality by means of wavelet-transform apparatus [Текст] / Volodymyr Vanko, Petro Stolyarchuk // Computational problems of electrical engineeringVol. 2. Vol. 2. N. 1 ; Lviv Polytechnic Nat. Univ. ; ed.-in-chief Yuriy Bobalo - Lviv : Lviv Polytechnic nat. univ. , 2012. — P. 139-145.