@article{GDZPPN002350157,
title = {On Group and Nongroup Perfect Codes in q Symbols.},
journal = {Mathematica Scandinavica},
volume = {24},
year = {1969},
pages = {149-158},
zbl = {0205.46903},
url = {http://dml.mathdoc.fr/item/GDZPPN002350157}
}
Lindström, Bernt. On Group and Nongroup Perfect Codes in q Symbols.. Mathematica Scandinavica, Tome 24 (1969) pp. 149-158. http://gdmltest.u-ga.fr/item/GDZPPN002350157/