Fábio Protti, Jayme Luiz Szwarcfiter. 4-free graphs. Journal of Graph Theory, 35(4):257-272, 2000. [doi]
@article{ProttiS00,
title = {4-free graphs},
author = {Fábio Protti and Jayme Luiz Szwarcfiter},
year = {2000},
doi = {10.1002/1097-0118(200012)35:4<257::AID-JGT3>3.0.CO;2-4},
url = {http://dx.doi.org/10.1002/1097-0118(200012)35:4<257::AID-JGT3>3.0.CO;2-4},
researchr = {https://researchr.org/publication/ProttiS00},
cites = {0},
citedby = {0},
journal = {Journal of Graph Theory},
volume = {35},
number = {4},
pages = {257-272},
}