@article{IVM_2019_8_a0,
     author = {V. S. Abramov and A. A. Bobodzhanov and M. A. Bobodzhanova},
     title = {A method of normal forms for nonlinear singularly perturbed systems in case of intersection of eigenvalues of limit operator},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--12},
     publisher = {mathdoc},
     number = {8},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2019_8_a0/}
}