@article{VMUMM_2017_5_a11,
     author = {M. A. Ivashkovsky},
     title = {Immersions of graphs into projective plane},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {61--65},
     publisher = {mathdoc},
     number = {5},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2017_5_a11/}
}