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@article{MAN_1986__274_164118, author = {Carol Blomstrom}, title = {Planar {Geodesic} {Immersions} in {Pseudo-Euclidean} {Space.}}, journal = {Mathematische Annalen}, pages = {585--598}, publisher = {mathdoc}, volume = {274}, year = {1986}, zbl = {0572.53042}, url = {http://geodesic.mathdoc.fr/item/MAN_1986__274_164118/} }
Carol Blomstrom. Planar Geodesic Immersions in Pseudo-Euclidean Space.. Mathematische Annalen, Tome 274 (1986), pp. 585-598. http://geodesic.mathdoc.fr/item/MAN_1986__274_164118/