TY - JOUR AU - Sogge, Christopher D. TI - Oscillatory integrals and unique continuation for second order elliptic differential equations JO - Journal of the American Mathematical Society PY - 1989 SP - 491 EP - 515 VL - 02 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1989-0999662-3/ DO - 10.1090/S0894-0347-1989-0999662-3 ID - 10_1090_S0894_0347_1989_0999662_3 ER -