00353nam a2200121Ia 4500082001900000100004600019245006300065260003100128300001000159500000500169700003500174700002200209  a515.35bY15.LD  aYakubovich, V. A. and Starzhinskii, V. M.  aLinear differential equations with periodic coefficientsb  aNew YorkbJohn Wileyc1975  a839p.  a  aStarzhinskii, V. M.; jt. auth.  aLouvish, D. ; tr.