• [1] C. Kuratowski, Topologie II, Warsaw, 1950.
• [2] L. Nachbin, Topologia e ordem, Chicago, 1950.
• [3] W. L. Strother, Continuity for multi-valued functions, Tulane dissertation, 1952.
• [4] A. D. Wallace, A fixed-point theorem, Bull. Amer. Math. Soc. 51 (1945), 413–416. MR 12221, https://doi.org/10.1090/S0002-9904-1945-08367-0
• [5] L. E. Ward Jr., Partially ordered topological spaces, Proc. Amer. Math. Soc. 5 (1954), 144–161. MR 63016, https://doi.org/10.1090/S0002-9939-1954-0063016-5

Bibliography

[1]

C. Kuratowski, Topologie II, Warsaw, 1950.

[2]

L. Nachbin, Topologia e ordem, Chicago, 1950.

[3]

W. L. Strother, Continuity for multi-valued functions, Tulane dissertation, 1952.

[4]

A. D. Wallace, A fixed point theorem, Bull. Amer. Math. Soc. vol. 51 (1945) pp. 413-416. MR 0012221 (6:278a)

[5]

L. E. Ward, Jr., Partially ordered topological spaces, Summa Brasiliensis Mathematicae, to appear. MR 0063016 (16:59b)