@article{MZM_2003_73_6_a12,
     author = {V. V. Filippov},
     title = {On {Fucik} {Spectra} and {Periodic} {Solutions}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {910--922},
     publisher = {mathdoc},
     volume = {73},
     number = {6},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_73_6_a12/}
}