@article{DM_2006_18_4_a12,
     author = {S. A. Stepanov},
     title = {Nonlinear codes from modified {Butson{\textendash}Hadamard} matrices},
     journal = {Diskretnaya Matematika},
     pages = {137--147},
     year = {2006},
     volume = {18},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_2006_18_4_a12/}
}