@article{MAN_1977__228_162995,
     author = {Roger D. Nussbaum},
     title = {Generalizing the {Fixed} {Point} {Index.}},
     journal = {Mathematische Annalen},
     pages = {259--278},
     publisher = {mathdoc},
     volume = {228},
     year = {1977},
     zbl = {0365.58005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1977__228_162995/}
}