G. A. Leonov
Frequency methods in oscillation theory
Analiz ustoĭchivosti elektricheskikh mashin peremennogo toka
Chastotnye metody v teorii kolebaniĭ
Mathematical Problems of Control Theory
Nonlinear mathematical models of phase-locked loops
Stability of Stationary Sets in Control Systems with Discontinuous Nonlinearities
Stabilization of linear systems