@article{ZNSL_2019_488_a1,
     author = {D. V. Karpov},
     title = {On proper edge $3$-colorings of a cubic graph},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {31--48},
     publisher = {mathdoc},
     volume = {488},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2019_488_a1/}
}