@article{10_4064_ap_31_1_1_13,
     author = {Micha{\l} Kisielewicz},
     title = {On some applications of {Bogoliubov} method for hyperbolic equations},
     journal = {Annales Polonici Mathematici},
     pages = {1--13},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {1975},
     doi = {10.4064/ap-31-1-1-13},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-31-1-1-13/}
}