TY - JOUR AU - Neil S. Trudinger TI - On the First Eigenvalue of Non-Uniformly Elliptic Boundary Value Problems. JO - Mathematische Zeitschrift PY - 1980 SP - 227 EP - 232 VL - 174 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZ_1980__174_173009/ ID - MZ_1980__174_173009 ER -