@article{RSMUP_1982__68__49_0,
     author = {Leimanis, Eugene},
     title = {On integration of the differential equation of central motion, {I}},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {49--61},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {68},
     year = {1982},
     mrnumber = {702145},
     zbl = {0516.70006},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1982__68__49_0/}
}