@article{1183499462,
author = {Copeland, A. H.},
title = {A mixture theorem for nonconservative mechanical systems},
journal = {Bull. Amer. Math. Soc.},
volume = {42},
number = {12},
year = {1936},
pages = { 895-900},
language = {en},
url = {http://dml.mathdoc.fr/item/1183499462}
}
Copeland, A. H. A mixture theorem for nonconservative mechanical systems. Bull. Amer. Math. Soc., Tome 42 (1936) no. 12, pp. 895-900. http://gdmltest.u-ga.fr/item/1183499462/