@article{JSFU_2014_7_2_a6,
     author = {Alexander A. Makhnev and Marina S. Nirova},
     title = {On distance-regular graphs with $\lambda=2$},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {204--210},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2014_7_2_a6/}
}