@article{AIHPC_2003__20_2_271_0,
     author = {Cingolani, Silvia and Vannella, Giuseppina},
     title = {Critical groups computations on a class of {Sobolev} {Banach} spaces via {Morse} index},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {271--292},
     publisher = {Elsevier},
     volume = {20},
     number = {2},
     year = {2003},
     doi = {10.1016/S0294-1449(02)00011-2},
     mrnumber = {1961517},
     zbl = {1023.58004},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/S0294-1449(02)00011-2/}
}