@article{CMH_1979__54_139764,
     author = {Burton Randol},
     title = {Cylinders in {Riemann} surfaces},
     journal = {Commentarii mathematici Helvetici},
     pages = {1--5},
     publisher = {mathdoc},
     volume = {54},
     year = {1979},
     zbl = {0401.30036},
     url = {http://geodesic.mathdoc.fr/item/CMH_1979__54_139764/}
}