@article{bwmeta1.element.bwnjournal-article-fmv32i1p12bwm,
author = {Edward Szpilrajn},
title = {On the isomorphism and the equivalence of classes and sequences of sets},
journal = {Fundamenta Mathematicae},
volume = {32},
year = {1939},
pages = {133-148},
zbl = {65.1167.01},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv32i1p12bwm}
}
Szpilrajn, Edward. On the isomorphism and the equivalence of classes and sequences of sets. Fundamenta Mathematicae, Tome 32 (1939) pp. 133-148. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv32i1p12bwm/