@article{IM2_2020_84_3_a4,
     author = {V. N. Pavlenko and D. K. Potapov},
     title = {On a~class of~elliptic boundary-value problems with parameter and discontinuous non-linearity},
     journal = {Izvestiya. Mathematics },
     pages = {592--607},
     publisher = {mathdoc},
     volume = {84},
     number = {3},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2020_84_3_a4/}
}