000 00263nas a2200085 a 4500
008 140527s9999 xx 000 0 und d
245 _aJournal of Combinatorial Theory
260 _bAcademic Press
_aNew York and London
_c1981
530 _aVol:30;Issue:1-3;Month:Feb-Jun;
999 _c11572
_d11572