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@article{MZ_1991__208_3_174342, author = {F. Mil\'an and A. Mart{\'\i}nez}, title = {On affine-maximal ruled surfaces.}, journal = {Mathematische Zeitschrift}, pages = {635--644}, publisher = {mathdoc}, volume = {208}, number = {3}, year = {1991}, zbl = {0754.53016}, url = {http://geodesic.mathdoc.fr/item/MZ_1991__208_3_174342/} }
F. Milán; A. Martínez. On affine-maximal ruled surfaces.. Mathematische Zeitschrift, Tome 208 (1991) no. 3, pp. 635-644. http://geodesic.mathdoc.fr/item/MZ_1991__208_3_174342/