@article{AIHPC_2005__22_5_557_0,
     author = {Jakob, Ruben},
     title = {$H$-surface index formula},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {557--578},
     publisher = {Elsevier},
     volume = {22},
     number = {5},
     year = {2005},
     doi = {10.1016/j.anihpc.2004.10.008},
     mrnumber = {2171991},
     zbl = {1082.53007},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2004.10.008/}
}