@article{1028998766,
author = {Lyndon, R. C. and Sch\"utzenberger, M. P.},
title = {The equation $a^M=b^Nc^P$ in a free group.},
journal = {Michigan Math. J.},
volume = {9},
number = {1},
year = {1962},
pages = { 289-298},
language = {en},
url = {http://dml.mathdoc.fr/item/1028998766}
}
Lyndon, R. C.; Schützenberger, M. P. The equation $a^M=b^Nc^P$ in a free group.. Michigan Math. J., Tome 9 (1962) no. 1, pp. 289-298. http://gdmltest.u-ga.fr/item/1028998766/