Geodesic
On a perfect problem
Discussiones Mathematicae. Graph Theory, Tome 26 (2006) no. 2, pp. 273-277 Cet article a éte moissonné depuis la source Library of Science

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We solve Open Problem (xvi) from Perfect Problems of Chvátal [1] available at ftp://dimacs.rutgers.edu/pub/perfect/problems.tex: Is there a class C of perfect graphs such that
Keywords: hereditary classes, perfect graphs 
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Zverovich, Igor. On a perfect problem. Discussiones Mathematicae. Graph Theory, Tome 26 (2006) no. 2, pp. 273-277. http://geodesic.mathdoc.fr/item/DMGT_2006_26_2_a7/

[1] V. Chvátal, Perfect Problems, available at http://www.cs.concordia.ca/∼chvatal/perfect/problems.html.

[2] G.A. Dirac, On rigid circuit graphs, Abh. Math. Semin. Univ. Hamburg 25 (1961) 71-76, doi: 10.1007/BF02992776.

[3] Perfect graphs, Edited by J.L. Ramírez Alfonsín and B.A. Reed, Wiley-Interscience Series in Discrete Mathematics and Optimization (John Wiley Sons, Ltd., Chichester, 2001) xxii+362 pp.

[4] A.A. Zykov, Fundamentals of Graph Theory (Nauka, Moscow, 1987) 382 pp. (in Russian), translated and edited by L. Boron, C. Christenson and B. Smith (BCS Associates, Moscow, ID, 1990) vi+365 pp.