Tham khảo Bổ đề Farkas

Berkovitz, Leonard D. (2001), Convexity and Optimization in R n {\displaystyle \mathbb {R} ^{n}} , New York: John Wiley & Sons, ISBN 978-0-471-35281-5 .
Farkas, Gyula (1894), “A Fourier-féle mechanikai elv alkamazásai”, Mathematikai és Természettudományi Értesítő 12: 457–472, reference from Schrijver's Combinatorial Optimization textbook .
Farkas, Julius (Gyula) (1902), “Über die Theorie der Einfachen Ungleichungen”, Journal für die Reine und Angewandte Mathematik 124 (124): 1–27, doi:10.1515/crll.1902.124.1 .
Rockafellar, R. T. (1979), Convex Analysis, Princeton University Press, tr. 200
Gale; Kuhn; Tucker (1951), “Linear Programming and the Theory of Games - Chapter XII”, trong Koopmans, Activity Analysis of Production and Allocation (PDF), Wiley . Xem bổ đề 1 ở trang 318.
Kutateladze, S. (2010), “The Farkas Lemma Revisited” (PDF), Siberian Mathematical Journal 51 (1): 78–87, doi:10.1007/s11202-010-0010-y.

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