Convexity of balls and fixed-point theorems for mappings with nonexpansive square
Goebel, K.
Compositio Mathematica, Tome 22 (1970), p. 269-274 / Harvested from Numdam
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@article{CM_1970__22_3_269_0,
     author = {Goebel, K.},
     title = {Convexity of balls and fixed-point theorems for mappings with nonexpansive square},
     journal = {Compositio Mathematica},
     volume = {22},
     year = {1970},
     pages = {269-274},
     mrnumber = {273477},
     zbl = {0202.12802},
     language = {en},
     url = {http://dml.mathdoc.fr/item/CM_1970__22_3_269_0}
}

Goebel, K. Convexity of balls and fixed-point theorems for mappings with nonexpansive square. Compositio Mathematica, Tome 22 (1970) pp. 269-274. http://gdmltest.u-ga.fr/item/CM_1970__22_3_269_0/

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