00291nam a2200097Ia 4500008004100000082002000041100002700061245006900088260003000157300000600187260908b        |||||||| |||| 00| 0 eng d  a515.35bIb14.CR  aIbragimov, N. H.d ed.  aCRC handbook of lie groups analysis of differential equationsb/  aLondon:bCRC Press,c1994  a