@article{1103034550, author = {DeMarr, Ralph}, title = {Common fixed points for commuting contraction mappings.}, journal = {Pacific J. Math.}, volume = {13}, number = {4}, year = {1963}, pages = { 1139-1141}, language = {en}, url = {http://dml.mathdoc.fr/item/1103034550} }
DeMarr, Ralph. Common fixed points for commuting contraction mappings.. Pacific J. Math., Tome 13 (1963) no. 4, pp. 1139-1141. http://gdmltest.u-ga.fr/item/1103034550/