@article{MZM_2002_72_6_a12,
     author = {J. Hay},
     title = {On {Necessary} {Conditions} for the {Existence} of {Local} {Solutions} to {Singular} {Nonlinear} {Ordinary} {Differential} {Equations} and {Inequalities}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {924--935},
     publisher = {mathdoc},
     volume = {72},
     number = {6},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2002_72_6_a12/}
}