@article{1183529410,
author = {Frol\'\i k, Zden\v ek},
title = {Fixed points of maps of $\beta N$},
journal = {Bull. Amer. Math. Soc.},
volume = {74},
number = {6},
year = {1968},
pages = { 187-191},
language = {en},
url = {http://dml.mathdoc.fr/item/1183529410}
}
Frolík, Zdeněk. Fixed points of maps of $\beta N$. Bull. Amer. Math. Soc., Tome 74 (1968) no. 6, pp. 187-191. http://gdmltest.u-ga.fr/item/1183529410/