Authors
Dariusz Ficek
Institute of Physics, Pomeranian University, Słupsk, Poland
Magdalena Wielgat-Rychert
Institute of Biology and Environmental Protection, Pomeranian University, Słupsk, Poland
© 2009 Dariusz Ficek, Magdalena Wielgat-Rychert, published by University of Gdańsk
This work is licensed under the Creative Commons License.