Wen Liu, Jing Lin. Walk Regular Digraphs. Ars Comb., 95, 2010.
@article{LiuL10-70,
title = {Walk Regular Digraphs},
author = {Wen Liu and Jing Lin},
year = {2010},
researchr = {https://researchr.org/publication/LiuL10-70},
cites = {0},
citedby = {0},
journal = {Ars Comb.},
volume = {95},
}