@article{GDZPPN002028077, title = {Abstract Characterizations of Continuous Functions.}, journal = {Aequationes mathematicae}, volume = {10}, year = {1974}, pages = {121-127}, zbl = {0291.54006}, url = {http://dml.mathdoc.fr/item/GDZPPN002028077} }
Penner, Sidney; Schroeder, Karl J. Abstract Characterizations of Continuous Functions.. Aequationes mathematicae, Tome 10 (1974) pp. 121-127. http://gdmltest.u-ga.fr/item/GDZPPN002028077/