TY - JOUR AU - Knoflíček, František TI - A combinatorial approach to the known projective planes of order nine JO - Mathematica Bohemica PY - 1995 SP - 347 EP - 366 VL - 120 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/MB.1995.126096/ DO - 10.21136/MB.1995.126096 LA - en ID - 10_21136_MB_1995_126096 ER -