00511oam 2200193z- 450 991014069030332120170919215817.01-4020-0609-8(CKB)3160000000000012(EXLCZ)99316000000000001220121018cuuuuuuuu -u- -engEncyclopaedia of MathematicsAmsterdamCWIHazewinkelMichiel13005BOOK9910140690303321Encyclopaedia of mathematics922423UNINA