00347nam a2200109Ia 4500008004100000082002000041100001800061245005200079260003600131300002700167490004300194250404b        |||||||| |||| 00| 0 eng d  a515.64bD118.DM  aDacorogna, B.  aDirect methods in the calculus of variationsb/  aBerlin:bSpringer-Verlag,c1989  aix, 308p. Index. Bibl.  aApplied Mathematical Sciences v v. 78