@article{PDM_2021_2_a5,
     author = {M. B. Abrosimov and S. V. Kostin and I. V. Los},
     title = {The maximum number of vertices of primitive regular graphs of orders $2, 3, 4$ with exponent~$2$},
     journal = {Prikladna\^a diskretna\^a matematika},
     pages = {97--104},
     publisher = {mathdoc},
     number = {2},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PDM_2021_2_a5/}
}