@article{GDZPPN002063026, title = {Cylinders on surfaces.}, journal = {Commentarii mathematici Helvetici}, volume = {53}, year = {1978}, pages = {439-447}, zbl = {0414.53032}, url = {http://dml.mathdoc.fr/item/GDZPPN002063026} }
Chavel, Isaac; Feldman, Edgar A. Cylinders on surfaces.. Commentarii mathematici Helvetici, Tome 53 (1978) pp. 439-447. http://gdmltest.u-ga.fr/item/GDZPPN002063026/