TY - JOUR AU - Cheung, Alan L. C. TI - Adjoints of a Geometry JO - Canadian mathematical bulletin PY - 1974 SP - 363 EP - 365 VL - 17 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-066-5/ DO - 10.4153/CMB-1974-066-5 ID - 10_4153_CMB_1974_066_5 ER -