@article{PDM_2022_4_a6,
     author = {B. N. Ivanov},
     title = {A direct method for calculating cell cycles of~a~block~map of a simple planar graph},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {69--83},
     publisher = {mathdoc},
     number = {4},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2022_4_a6/}
}