@article{1102993713, author = {Franklin, S. P. and Sorgenfrey, R. H.}, title = {Closed and image-closed relations.}, journal = {Pacific J. Math.}, volume = {19}, number = {3}, year = {1966}, pages = { 433-439}, language = {en}, url = {http://dml.mathdoc.fr/item/1102993713} }
Franklin, S. P.; Sorgenfrey, R. H. Closed and image-closed relations.. Pacific J. Math., Tome 19 (1966) no. 3, pp. 433-439. http://gdmltest.u-ga.fr/item/1102993713/