Double resonance and multiple solutions for semilinear elliptic equations
Rendiconti del Seminario Matematico della Università di Padova, Tome 72 (1984), pp. 329-342. 
@article{RSMUP_1984__72__329_0,
     author = {Srikanth, P. N.},
     title = {Double resonance and multiple solutions for semilinear elliptic equations},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {329--342},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {72},
     year = {1984},
     mrnumber = {778349},
     zbl = {0575.35032},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1984__72__329_0/}
}
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Srikanth, P. N. Double resonance and multiple solutions for semilinear elliptic equations. Rendiconti del Seminario Matematico della Università di Padova, Tome 72 (1984), pp. 329-342. http://archive.numdam.org/item/RSMUP_1984__72__329_0/

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