@article{10_4064_ap_15_2_189_194,
     author = {R. Krasnod\k{e}bski},
     title = {A natural parameter of a curve in the symplectic space},
     journal = {Annales Polonici Mathematici},
     pages = {189--194},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1964},
     doi = {10.4064/ap-15-2-189-194},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-15-2-189-194/}
}