Dan Archdeacon, Charles J. Colbourn, Isidoro Gitler, J. Scott Provan. Four-terminal reducibility and projective-planar wye-delta-wye-reducible graphs. Journal of Graph Theory, 33(2):83-93, 2000. [doi]
@article{ArchdeaconCGP00,
title = {Four-terminal reducibility and projective-planar wye-delta-wye-reducible graphs},
author = {Dan Archdeacon and Charles J. Colbourn and Isidoro Gitler and J. Scott Provan},
year = {2000},
doi = {10.1002/(SICI)1097-0118(200002)33:2<83::AID-JGT3>3.0.CO;2-P},
url = {http://dx.doi.org/10.1002/(SICI)1097-0118(200002)33:2<83::AID-JGT3>3.0.CO;2-P},
researchr = {https://researchr.org/publication/ArchdeaconCGP00},
cites = {0},
citedby = {0},
journal = {Journal of Graph Theory},
volume = {33},
number = {2},
pages = {83-93},
}