@article{1102364180,
author = {Borzellino, Joseph E. and Lorica, Benjamin G.},
title = {The closed geodesic problem for compact Riemannian $2$-orbifolds.},
journal = {Pacific J. Math.},
volume = {176},
number = {2},
year = {1996},
pages = { 39-46},
language = {en},
url = {http://dml.mathdoc.fr/item/1102364180}
}
Borzellino, Joseph E.; Lorica, Benjamin G. The closed geodesic problem for compact Riemannian $2$-orbifolds.. Pacific J. Math., Tome 176 (1996) no. 2, pp. 39-46. http://gdmltest.u-ga.fr/item/1102364180/