@article{ISU_2021_21_3_a11,
     author = {P. V. Razumovsky},
     title = {The search for minimal edge $1$-extension of an undirected colored graph},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {400--407},
     publisher = {mathdoc},
     volume = {21},
     number = {3},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ISU_2021_21_3_a11/}
}