@article{ASNSP_2010_5_9_2_423_0,
     author = {Wei, Juncheng and Yan, Shusen},
     title = {On a stronger {Lazer-McKenna} conjecture for {Ambrosetti-Prodi} type problems},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {423--457},
     publisher = {Scuola Normale Superiore, Pisa},
     volume = {Ser. 5, 9},
     number = {2},
     year = {2010},
     mrnumber = {2731162},
     zbl = {1204.35094},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_2010_5_9_2_423_0/}
}