@article{CMUC_2012__53_4_a5,
     author = {Pupka, Krzysztof},
     title = {Fixed points of periodic and firmly lipschitzian mappings in {Banach} spaces},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {573--579},
     publisher = {mathdoc},
     volume = {53},
     number = {4},
     year = {2012},
     mrnumber = {3016427},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2012__53_4_a5/}
}