@article{2283,
author = {Swingle, Paul M.},
title = {Local properties and sums of trajectories},
journal = {Portugaliae mathematica},
volume = {15},
year = {1956},
pages = {89-103},
zbl = {0071.38503},
mrnumber = {0087928},
language = {en},
url = {http://dml.mathdoc.fr/item/2283}
}
Swingle, Paul M. Local properties and sums of trajectories. Portugaliae mathematica, Tome 15 (1956) pp. 89-103. http://gdmltest.u-ga.fr/item/2283/