@article{e20e8c3291334fd5abc5551c9bb9f404,
title = "Some sufficient conditions for a planar graph to be of Class 1",
abstract = "In this paper, we first give some upper bounds on the number of edges for two classes of planar graphs. Then using these upper bounds, we obtain some sufficient conditions for a planar graph to be of Class 1.",
keywords = "chromatic index, planar graph, Class 1 graph",
author = "Lam, {Peter Che Bor} and Jiazhuang Liu and Shiu, {Wai Chee} and Jianliang Wu",
note = "Funding information: Research is partially supported by FRG, Hong Kong Baptist University; RGC Grant, Hong Kong; and by the Doctoral Foundation of the Education Commission of The Peoples' Republic of China.",
year = "1999",
month = dec,
language = "English",
volume = "136",
pages = "201--205",
journal = "Congressus Numerantium",
issn = "0384-9864",
publisher = "Utilitas Mathematica Publishing",
}