TY - JOUR AU - Sten Hansen TI - On configurations in 3-space without elementary planes and on the number of ordinary planes. JO - Mathematica Scandinavica PY - 1980 SP - 181 EP - 194 VL - 47 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MS2_1980__47_166722/ ID - MS2_1980__47_166722 ER -