00666nam a2200193Ia 4500082002100000100002000021245012100041260002700162300002500189490006500214500002800279500000500307690000600312700000500318952010500323964001700428921001000445999001700455  a515.35bSh561.LD  aShtokalo, I. Z.  aLinear differential equations with variable coefficients; criteria of stability and unstability of their solutionsb  aDelhibHindustanc1961  avii, vi, 100p. Bibl.  aInternational monographs on Advanced Mathematics and Physics  a"Tr. from the Russian".  a  a   a  001040708GRaISIbISId1998-09-28l0o515.35 Sh561.LDpG1295r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a14588  c14588d14588