@article{GDZPPN002185229,
title = {A nontransformation proof of Mann's density theorem.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {244},
year = {1970},
pages = {41-46},
zbl = {0206.06203},
url = {http://dml.mathdoc.fr/item/GDZPPN002185229}
}
Garrison, Betty Kvarda. A nontransformation proof of Mann's density theorem.. Journal für die reine und angewandte Mathematik, Tome 244 (1970) pp. 41-46. http://gdmltest.u-ga.fr/item/GDZPPN002185229/