Demkiv, I. I.     Research of dynamic system with unstable subsystem that has one root in the right half-plane [Текст] / I.I. Demkiv // Mathematical Modeling and Computing / Lviv Polytechnic Nat. Univ. ; ed.-in-chief Yuriy Bobalo. — Lviv : Lviv Polytechnic Nat. Univ., 2014. — P. 156-162.