@article{bks-dgmdecmr-04,
author = {S.N. Bereg and A.V. Kelarev and A. Salagean},
title = {Directed Graphs and Minimum Distances of Error-Correcting Codes in Matrix Rings},
journal = {New Zealand Journal of Mathematics},
year = {2004},
volume = {33},
pages = {113--119},
url = {http://www.math.auckland.ac.nz/NZJM}
}