@article{1200770451,
author = {Nakai, Yoshikazu and Baba, Kiyoshi},
title = {A generalization of Magnus' theorem},
journal = {Osaka J. Math.},
volume = {14},
number = {1},
year = {1977},
pages = { 403-409},
language = {en},
url = {http://dml.mathdoc.fr/item/1200770451}
}
Nakai, Yoshikazu; Baba, Kiyoshi. A generalization of Magnus' theorem. Osaka J. Math., Tome 14 (1977) no. 1, pp. 403-409. http://gdmltest.u-ga.fr/item/1200770451/