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"Perfect Graphs and Orthogonally Convex Covers."
Rajeev Motwani, Arvind Raghunathan, Huzur Saran (1989)
- Rajeev Motwani, Arvind Raghunathan, Huzur Saran:
Perfect Graphs and Orthogonally Convex Covers. SIAM J. Discret. Math. 2(3): 371-392 (1989)

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