@article{PIM_1980_N_S_27_41_a18,
     author = {Vlajko Lj. Koci\'c},
     title = {Conditions {For} {The} {Integrability} {Of} {A} {Second} {Order} {Nonlinear} {Differential} {Equation}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {115 },
     publisher = {mathdoc},
     volume = {_N_S_27},
     number = {41},
     year = {1980},
     url = {http://geodesic.mathdoc.fr/item/PIM_1980_N_S_27_41_a18/}
}