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"Indifference Digraphs: A Generalization of Indifference Graphs and Semiorders."
Malay K. Sen, Barun K. Sanyal (1994)
- Malay K. Sen, Barun K. Sanyal:
Indifference Digraphs: A Generalization of Indifference Graphs and Semiorders. SIAM J. Discret. Math. 7(2): 157-165 (1994)
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