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1. Mansfield and Solovay type results on covering plane sets by lines, Nagoya Mathematical Journal, vol.124 (1991), pages 145-155.
2. On homogeneity of hyperspace of the Rationals, Tsukuba Journal of Mathematics, vol.20-1 (1996), pages 213--218.
3. A measure theoretic basis theorem for $$\Pi^1_2$$, Journal of Mathematical Society of Japan, vol.52-2 (2000), pages 335--341.
4. Topological groups with dense compactly generated subgroups, Applied General Topology, vol.3-1 (2002), pages 85--89.
5. A characterization of compactly generated metric groups, Proceedings of American Mathematical Society, vol.131-3 (2002), page s 953--961.
6. Remarks on two problems by M. Laczkovich on functions with Borel measurable differences, Acta Mathematica Hungarica, vol.117 (2007), pages 153--160.
7. On the difference property of Borel measurable functions, Fundamenta Mathematicae, vol. 208 (2010), pages 57--73.

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### Hiroshi Fujita

Department of Mathematics, Faculty of Science,
Ehime University.
Matsuyama 790-0012
Japan