1977/10/01 by K. I. Appel, Kenneth Appel, Wolfgang Haken · 4 citations
Computer Science · #Graph Labeling and Dimension Problems
paper · doi:10.1038/scientificamerican1077-108
crossref issued 1977/10/01 · crossref published 1977/10/01 · crossref published-print 1977/10/01 · openalex publication_date 1977/10/01 · crossref created 2010/02/24 · crossref deposited 2021/01/11 · openalex created_date 2025/10/10 · crossref indexed 2026/07/11 · openalex updated_date 2026/07/15