00427nam a2200169Ia 4500003000400000005001700004008004100021020001400062040000700076041000800083082002000091100003400111245004600145260003600191300001600227365001400243OSt20230403154353.0210423s2003    xx            000 0 und d  a444513159  cAL  aeng  a515.35 KONM223  aKONSTANTINOV (Mihail);others.  aPerturbation theory for matrix equations.  aAmsterdambElsevier Indiac2003  axii,429bHB  b6958cINR