@article{FAA_2010_44_3_a1,
     author = {E. I. Kaikina and P. I. Naumkin and I. A. Shishmarev},
     title = {Periodic {Boundary} {Value} {Problem} for {Nonlinear} {Sobolev-Type} {Equations}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {14--26},
     publisher = {mathdoc},
     volume = {44},
     number = {3},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2010_44_3_a1/}
}