@article{DEMR_2020_13_a1,
     author = {A. M. Magomedov and S. Lawrencenko},
     title = {Solving puzzles by {O.} {Ore's} method},
     journal = {Daghestan Electronic Mathematical Reports},
     pages = {22--30},
     year = {2020},
     number = {13},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DEMR_2020_13_a1/}
}