TY - JOUR AU - Duff, G. F. D. AU - Ross, R. A. TI - Indefinite Green's Functions and Elementary Solutions JO - Canadian mathematical bulletin PY - 1963 SP - 71 EP - 103 VL - 6 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1963-011-7/ DO - 10.4153/CMB-1963-011-7 ID - 10_4153_CMB_1963_011_7 ER -