@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/