[1] I. Baggs: Functions with a closed graph. Proc. Amer. Math. Soc. 43 (1974), 439-442. MR 0334132 | Zbl 0281.54005

[2] R. V. Fuller: Relations among continuous and various non-continuous functions. Pacific Math. J. 25 (3), (1968), 495-509. MR 0227952 | Zbl 0165.25304

[3] K. R. Gentry, H. B. Hoyle, III.: C-continuous functions. Yokohama Math. J. 18 (1970), 71-76. MR 0282346 | Zbl 0217.48001

[4] J. L. Kelley: General Topology. (Russian translation - Moscow, 1981). Zbl 0518.54001

[5] P. Kostyrko, T. Šalát: On functions, the graphs of which are closed sets. Čas. pěst. mat. 89 (1964), 426 - 432 (in Russian). MR 0185577

[6] P. Kostyrko T. Neubrunn, T. Šalát: On functions, the graphs of which are closed sets II. Acta F.R.N. Univ. Comen. Math. I2 (1965), 51 - 61 (in Russian). MR 0214038

[7] P. Kostyrko: A note on the functions with closed graphs. Čas. pěst. mat. 94 (1969), 202-205. MR 0253304 | Zbl 0175.49402

[8] P. E. Long: Functions with closed graphs. Amer. Math. Monthly 76 (1969), 930-932. MR 1535590 | Zbl 0182.56002

[9] P. E. Long, E. E. McGehee, Jr.: Properties of almost continuous functions. Proc. Amer. Math. Soc. 24 (1970), 175-180. MR 0251704 | Zbl 0186.56003