@article{701629,
title = {On almost geodesic mappings of the type $\pi \_1$ of Riemannian spaces preserving a system $n$-orthogonal hypersurfaces},
booktitle = {Proceedings of the 18th Winter School "Geometry and Physics"},
series = {GDML\_Books},
publisher = {Circolo Matematico di Palermo},
address = {Palermo},
year = {1999},
pages = {103-108},
mrnumber = {MR1692261},
zbl = {0965.53018},
url = {http://dml.mathdoc.fr/item/701629}
}
Berezovskij, Vladimir; Mikeš, Josef. On almost geodesic mappings of the type $\pi _1$ of Riemannian spaces preserving a system $n$-orthogonal hypersurfaces, dans Proceedings of the 18th Winter School "Geometry and Physics", GDML_Books, (1999), pp. 103-108. http://gdmltest.u-ga.fr/item/701629/