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The four color theorem has been proved
Publication year - 1977
Publication title -
journal of graph theory
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.164
H-Index - 54
eISSN - 1097-0118
pISSN - 0364-9024
DOI - 10.1002/jgt.3190010302
Subject(s) - graph , combinatorics , citation , computer science , mathematics , discrete mathematics , information retrieval , world wide web