@article{01127645,
title = {Contact homogeneity and envelopes of Riemannian metrics.},
journal = {Beitr\"age zur Algebra und Geometrie},
volume = {39},
year = {1998},
pages = {155-167},
zbl = {0892.53010},
language = {en},
url = {http://dml.mathdoc.fr/item/01127645}
}
Kowalski, Oldřich; Nikčević, Stana Ž. Contact homogeneity and envelopes of Riemannian metrics.. Beiträge zur Algebra und Geometrie, Tome 39 (1998) pp. 155-167. http://gdmltest.u-ga.fr/item/01127645/