TY  - BOOK
AU  - Graef John R & Kong Lingju
TI  - Multiple Solutions of Boundary Value Problems: a Variational Approach
SN  - 9789814696555
PB  - World Scientific
KW  - Mathematics
UR  - https://www.worldscientific.com/worldscibooks/10.1142/9663#t=toc
ER  -