| [2] | Contents. |
| 3-15 | Graphs and quasitrivial groupoids. Vítek, Milan |
| 17-27 | On strong continuity of derivatives of mappings. Durdil, J. |
| 29-40 | On the radical theory of involution algebras. Loi, N. V. |
| 41-47 | A direct transformation between two fundamental matrix canonical forms. Beran, Ladislav |
| 49-61 | Evolution of process coefficient of the sulphur dioxide in urban zone. Iglesias, Miguel A. Pascual |
| 63-68 | Some remarks on infrared spectroscopy of astronomically interesting silicates. Henning, Th. |