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@article{JRAM_1990__412_153278, author = {Charles H. Walter}, title = {Curves on surfaces with multiple line.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {48--62}, publisher = {mathdoc}, volume = {412}, year = {1990}, zbl = {0712.14016}, url = {http://geodesic.mathdoc.fr/item/JRAM_1990__412_153278/} }
Charles H. Walter. Curves on surfaces with multiple line.. Journal für die reine und angewandte Mathematik, Tome 412 (1990), pp. 48-62. http://geodesic.mathdoc.fr/item/JRAM_1990__412_153278/