@article{03824071,
title = {A generalization of a theorem of A. D. Otto.},
journal = {Publications de l'Institut Math\'ematique. Nouvelle S\'erie},
volume = {33(47)},
year = {1983},
pages = {69-71},
zbl = {0521.20010},
language = {en},
url = {http://dml.mathdoc.fr/item/03824071}
}
Exarchakos, Th. A generalization of a theorem of A. D. Otto.. Publications de l'Institut Mathématique. Nouvelle Série, Tome 33(47) (1983) pp. 69-71. http://gdmltest.u-ga.fr/item/03824071/