@article{GDZPPN002485737,
title = {On 3-Dimensional Riemannian ...-Spaces.},
journal = {Monatshefte f\"ur Mathematik},
volume = {104},
year = {1987},
pages = {303-320},
zbl = {0632.53040},
url = {http://dml.mathdoc.fr/item/GDZPPN002485737}
}
Kowalski, Oldrich; Sekizawa, Masami. On 3-Dimensional Riemannian ...-Spaces.. Monatshefte für Mathematik, Tome 104 (1987) pp. 303-320. http://gdmltest.u-ga.fr/item/GDZPPN002485737/