@article{GDZPPN002445638, title = {Geodesics and soap bubbles in surfaces.}, journal = {Mathematische Zeitschrift}, volume = {221}, year = {1996}, pages = {185-196}, zbl = {0865.53009}, url = {http://dml.mathdoc.fr/item/GDZPPN002445638} }
Morgan, Frank; Hass, Joel. Geodesics and soap bubbles in surfaces.. Mathematische Zeitschrift, Tome 221 (1996) pp. 185-196. http://gdmltest.u-ga.fr/item/GDZPPN002445638/