@article{FPM_2015_20_2_a1,
     author = {P. V. Bibikov},
     title = {On the geometry of quadratic second-order {Abel} ordinary differential equations},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {21--34},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2015_20_2_a1/}
}