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Bibliography

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H. Blumberg, The measurable boundaries of an arbitrary function, Acta Math. 65 (1935), 263-282. MR 1555405

[2]

A. Denjoy, Sur les fonctions dérivées sommable, Bull. Soc. Math. France 43 (1916), 161-248.

[3]

C. Goffman, C. J. Neugebauer and T. Nishiura, Density topology and approximate continuity, Duke Math. J. 28 (1961), 497-506. MR 0137805 (25:1254)

[4]

C. Goffman and D. Waterman, Approximately continuous transformations, Proc. Amer. Math. Soc. 67 (1961), 116-121. MR 0120327 (22:11082)

[5]

O. Haupt and C. Pauc, La topologie approximative de Denjoy envisagée comme vraie topologie, C. R. Acad. Sci. Paris 234 (1952), 390-392. MR 0046408 (13:728i)

[6]

K. Nagami, Baire sets, Borel sets and some typical semi-continuous functions, Nagoya Math. J. 7 (1954), 85-93. MR 0069862 (16:1092a)

[7]

R. E. Zink, A classification of measure spaces, Colloq. Math. (to appear). MR 0200403 (34:298)