00474nam a2200145Ia 4500008004100000082002000041100001700061245003500078260003700113300002100150440005200171500004500223700003000268700003000298260811b        |||||||| |||| 00| 0 eng d  a515.64bIo64.TE  aIoffe, A. D.  aTheory of external problemsb/  aAmsterdam:bNorth-Holland,c1979  axii, 460p. Index  aStudies in Mathematics and its applications ; 6  a"Translated from Russian by K. Makowski"  aTihomirov, V. M.eauthor.  aMakowski, K.etranslator.