Tham khảo Tập_lồi

    • Rawlins G.J.E. and Wood D, "Ortho-convexity and its generalizations", in: Computational Morphology, 137-152. Elsevier, 1988.
    • Rockafellar, Ralph Tyrell. Convex analysis. Princeton University Press, 1970.
    • Soltan, Valeriu, Introduction to the Axiomatic Theory of Convexity, Stiintsa, Chisinau, 1984 (tiếng Nga).