00700nam0-22002531i-450-990001157820403321000115782FED01000115782(Aleph)000115782FED0100011578220000920d1979----km-y0itay50------baengDiscontinuous cebysev systemsby ZielkeBerlin [etc.]Springer-Verlag1979Lecture Notes in Mathematics707Zielke,Roland55308ITUNINARICAUNIMARCBK990001157820403321C-20-(70719718MA1MA1Discontinuous Cebysev systems81130UNINAING01