TY - JOUR AU - Brown, William G. TI - Hesse's Theorem for a Quadrilateral Whose Sides Touch a Conic JO - Canadian mathematical bulletin PY - 1960 SP - 221 EP - 223 VL - 3 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1960-027-0/ DO - 10.4153/CMB-1960-027-0 ID - 10_4153_CMB_1960_027_0 ER -