@article{MZ_1929__29_168070, author = {C.E. Weatherburn}, title = {On {Weingarten} {Surfaces.}}, journal = {Mathematische Zeitschrift}, pages = {292--299}, publisher = {mathdoc}, volume = {29}, year = {1929}, zbl = {54.0744.03}, url = {http://geodesic.mathdoc.fr/item/MZ_1929__29_168070/} }