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@article{MASLO_1992__42_4_a7, author = {Matejdes, Milan}, title = {The projective properties of the extreme path derivatives}, journal = {Mathematica slovaca}, pages = {451--464}, publisher = {mathdoc}, volume = {42}, number = {4}, year = {1992}, mrnumber = {1195039}, zbl = {0761.26005}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1992__42_4_a7/} }
Matejdes, Milan. The projective properties of the extreme path derivatives. Mathematica slovaca, Tome 42 (1992) no. 4, pp. 451-464. http://geodesic.mathdoc.fr/item/MASLO_1992__42_4_a7/