@article{05657116,
title = {Free fall motion in an invariant field of forces: the 2D-case.},
journal = {Balkan Journal of Geometry and its Applications (BJGA)},
volume = {14},
year = {2009},
pages = {72-83},
zbl = {1186.53052},
language = {en},
url = {http://dml.mathdoc.fr/item/05657116}
}
Pripoae, Cristina-Liliana; Pripoae, Gabriel-Teodor. Free fall motion in an invariant field of forces: the 2D-case.. Balkan Journal of Geometry and its Applications (BJGA), Tome 14 (2009) pp. 72-83. http://gdmltest.u-ga.fr/item/05657116/