Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1966__7_2_a0, author = {Goral\v{c}{\'\i}k, Pavel}, title = {An example concerning small changes of commuting functions}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {123--126}, publisher = {mathdoc}, volume = {07}, number = {2}, year = {1966}, mrnumber = {0197625}, zbl = {0142.02302}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1966__7_2_a0/} }
Goralčík, Pavel. An example concerning small changes of commuting functions. Commentationes Mathematicae Universitatis Carolinae, Tome 07 (1966) no. 2, pp. 123-126. http://geodesic.mathdoc.fr/item/CMUC_1966__7_2_a0/