00337nam a2200121 a 450000500170000002000170001708200230003410000180005724500670007526000350014230000210017770000170019820251203090445.0  a012272795032  a515.7223,bDD, Gel  aGelfand, I.M.  aGeneralilzed functions: theory of differential equations v.1-5  aNew YorkbAcademic Pressc1967  ax, 222p., 22 cm.  aShilov, G.E.