TY - JOUR AU - Gregory, David A. TI - Upper Semi-Continuity of Subdifferential Mappings JO - Canadian mathematical bulletin PY - 1980 SP - 11 EP - 19 VL - 23 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1980-002-9/ DO - 10.4153/CMB-1980-002-9 ID - 10_4153_CMB_1980_002_9 ER -