@article{1183511694,
author = {Helsel, R. G. and Mickle, E. J.},
title = {The Kolmogoroff principle for the Lebesgue area},
journal = {Bull. Amer. Math. Soc.},
volume = {54},
number = {12},
year = {1948},
pages = { 235-238},
language = {en},
url = {http://dml.mathdoc.fr/item/1183511694}
}
Helsel, R. G.; Mickle, E. J. The Kolmogoroff principle for the Lebesgue area. Bull. Amer. Math. Soc., Tome 54 (1948) no. 12, pp. 235-238. http://gdmltest.u-ga.fr/item/1183511694/