Brian Alspach, Yi-Ping Liu, Cun-Quan Zhang. Nowhere-Zero 4-Flows and Cayley Graphs on Solvable Groups. SIAM J. Discrete Math., 9(1):151-154, 1996. [doi]
@article{AlspachLZ96,
title = {Nowhere-Zero 4-Flows and Cayley Graphs on Solvable Groups},
author = {Brian Alspach and Yi-Ping Liu and Cun-Quan Zhang},
year = {1996},
url = {http://epubs.siam.org/sam-bin/dbq/article/25801},
tags = {graph-rewriting, rewriting},
researchr = {https://researchr.org/publication/AlspachLZ96},
cites = {0},
citedby = {0},
journal = {SIAM J. Discrete Math.},
volume = {9},
number = {1},
pages = {151-154},
}