### Bibliography

#### Works connected to ~~Claude Berge~~

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Kempe chains and the four colour problem,” pp. 378–413 in Studies in graph theory, part II. Edited by C. Berge and D. R. Fulkerson. Studies in Mathematics 12. Mathematical Association of America (Washington, DC), 1975. MR 0392651 Zbl 0328.05107 incollection

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