@article{MZM_1991_50_1_a5,
     author = {A. V. Knyazev},
     title = {On~diameters of 2-regular graphs},
     journal = {Matemati\v{c}eskie zametki},
     pages = {46--55},
     publisher = {mathdoc},
     volume = {50},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_50_1_a5/}
}