| Tadeusz FIGIELSKI, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland |
| Waldemar GORZKOWSKI, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland |
| Marek GUTOWSKI, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland |
| Andrzej ŁUSAKOWSKI, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland |
| Jan MOSTOWSKI, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland |
| Tadeusz SKOŚKIEWICZ, Institue of Physics, Polish Academy of Sciences, Warsaw, Poland |
| Henryk SZYMCZAK, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland |
| Krzysztof ŚWIĄTEK, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland |
| Władysław ŻAKOWICZ, Institute of Physics, Polish Academy of Sciences, Warsaw, Poland |