Zbigniew Piotrowski, "On the theorems of Y. Mibu and G. Debs on separate continuity", International Journal of Mathematics and Mathematical Sciences, vol. 19, Article ID 785203, 6 pages, 1996. https://doi.org/10.1155/S0161171296000695
On the theorems of Y. Mibu and G. Debs on separate continuity
Using a game-theoretic characterization of Baire spaces, conditions upon the domain and the range are given to ensure a fat set of points of continuity in the sets of type , for certain almost separately continuous functions . These results (especially Theorem B) generalize Mibu's. First Theorem, previous theorems of the author, answers one of his problems as well as they are closely related to some other results of Debs  and Mibu .
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