00750nam0-22002651i-450-990001252510403321000125251FED01000125251(Aleph)000125251FED0100012525120000920d197----km-y0itay50------baengTheory of Extremal problemsAmsterdam [etc.]North-Holland197Studies in mathematics and its applications6Ioffe,Aleksandr Davidovich41266Ioffe,Boris LazarevichITUNINARICAUNIMARCBK990001252510403321C-53-(619614MA1MA1Theory of extremal problems348071UNINAING01