000 00298nam a22001097a 4500
020 _a9789814696548
082 _a518.62
_bGRA.M
100 _aGraef, John R
245 _aMultiple solutions of boundary value problems a variational approach
260 _aLondon
_bWorld scientific
_c2015
942 _cBK
999 _c448480
_d448480