@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/}
}