@article{GDZPPN002344793, title = {WALTER HELBIG GOTTSCHALK and GUSTAV HEDLUND : Topological dynamics}, journal = {Mathematica Scandinavica}, volume = {4}, year = {1956}, pages = {341-345}, url = {http://dml.mathdoc.fr/item/GDZPPN002344793} }
PEDERSEN, FLEMMING P. WALTER HELBIG GOTTSCHALK and GUSTAV HEDLUND : Topological dynamics. Mathematica Scandinavica, Tome 4 (1956) pp. 341-345. http://gdmltest.u-ga.fr/item/GDZPPN002344793/