@article{PDA_1971_3_1_a3,
     author = {J. Lazovi\'c},
     title = {The {Perturbed} {Motion} of {Asteroid} {In} {Proximity}},
     journal = {Publications of the Department of Astronomy},
     pages = {29 - 35},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {1971},
     url = {http://geodesic.mathdoc.fr/item/PDA_1971_3_1_a3/}
}