TY - JOUR AU - D. Klawitter TI - Null Polarities as Generators of the Projective Group JO - Journal for geometry and graphics PY - 2014 SP - 183 EP - 197 VL - 18 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JGG_2014_18_2_JGG_2014_18_2_a3/ ID - JGG_2014_18_2_JGG_2014_18_2_a3 ER -