TY - JOUR AU - Marsden, J. TI - A Proof of the Calderon Extension Theorem JO - Canadian mathematical bulletin PY - 1973 SP - 133 EP - 136 VL - 16 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-025-7/ DO - 10.4153/CMB-1973-025-7 ID - 10_4153_CMB_1973_025_7 ER -