[1] ARHANGEL'SKH A. V., PONOMAREV V. I.: Fundamentals of General Topology. Problems and Exercises, D. Reidel Publ. Co., Dordrecht, 1984. MR 0785749

[2] BERBERIAN K.: Lectures in Functional Analysis and Operator Theory. Springer-Verlag, New York Inc., 1974. MR 0417727 | Zbl 0296.46002

[3] JANKOVIC D. S.: Mappings of extremally disconnected spaces. Acta Math. Hungar. 46 (1985), 83-92. MR 0819058 | Zbl 0597.54037

[4] NAGATA J.: Modern General Topology. 2nd revised ed., Elsevier Sci. Publ. B. V., Amsterdam, 1985. MR 0831659 | Zbl 0598.54001

[5] TONG J.: A decomposition of continuity. Acta Math. Hungar. 48 (1986), 11-15. MR 0858377 | Zbl 0609.54012

[6] TONG J.: On decomposition of continuity in topological spaces. Acta Math. Hungar. 54 (1989), 51-55. MR 1015777 | Zbl 0724.54012

[7] TONG J.: Classification of weak continuities and decomposition of continuity. J. of Math. & Math. Sci. (To appear). MR 2145530 | Zbl 1066.54015