| 239 | -- | 251 | Roland Coghetto. Homography in ℝℙ |
| 253 | -- | 259 | Kazuhisa Nakasho, Keiko Narita, Yasunari Shidama. The Basic Existence Theorem of Riemann-Stieltjes Integral |
| 261 | -- | 273 | Rafal Ziobro. On Subnomials |
| 275 | -- | 280 | Karol Pak. Leibniz Series for π |
| 281 | -- | 290 | Mariusz Giero. The Axiomatization of Propositional Logic |
| 291 | -- | 299 | Yasushige Watase. Algebraic Numbers |
| 301 | -- | 308 | Artur Kornilowicz, Adam Naumowicz. Niven's Theorem |