@article{1183530539,
author = {Nussbaum, Roger D.},
title = {The fixed point index and asymptotic fixed point theorems for $k$-set-contractions},
journal = {Bull. Amer. Math. Soc.},
volume = {75},
number = {5},
year = {1969},
pages = { 490-495},
language = {en},
url = {http://dml.mathdoc.fr/item/1183530539}
}
Nussbaum, Roger D. The fixed point index and asymptotic fixed point theorems for $k$-set-contractions. Bull. Amer. Math. Soc., Tome 75 (1969) no. 5, pp. 490-495. http://gdmltest.u-ga.fr/item/1183530539/