@article{TIMM_2018_24_3_a14,
     author = {M. S. Nirova},
     title = {Codes in distance-regular graphs with $\theta_2~= -1$},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {155--163},
     year = {2018},
     volume = {24},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2018_24_3_a14/}
}