TY - JOUR AU - Rektorys, Karel AU - Vospěl, Zdeněk TI - On a method of two-sided eigenvalue estimates for elliptic equations of the form $Au-\lambda Bu=0$ JO - Applications of Mathematics PY - 1981 SP - 211 EP - 240 VL - 26 IS - 3 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/articles/10.21136/AM.1981.103913/ DO - 10.21136/AM.1981.103913 LA - en ID - 10_21136_AM_1981_103913 ER -