Authors
Krzysztof Rychert
Institute of Biology and Environmental Protection, Pomeranian University in Słupsk, Słupsk, Poland
Bożena Nawacka
Institute of Biology and Environmental Protection, Pomeranian University in Słupsk, Słupsk, Poland
Roman Majchrowski
Institute of Physics, Pomeranian University in Słupsk, Słupsk, Poland
Tomasz Zapadka
Institute of Physics, Pomeranian University in Słupsk, Słupsk, Poland