TY  - BOOK
AU  - Kuttler J R
AU  -  Sigillito V G
TI  - Estimating eigenvalue with a posteriori/ a priori inequalities
T2  - Research notes in mathematics; 135
U1  - B334, M5 
PY  - 1985///
CY  - Boston
PB  - Pitman Advanced Publisers       
KW  - Operator equations
N1  - Bibliography 144-149p
ER  -