Authors
Adam Stelmaszewski
a.stelmaszewski@wm.am.gdynia.pl
Physics Department, Maritime Academy, Gdynia, Poland
a.stelmaszewski@wm.am.gdynia.pl
© 2015 Adam Stelmaszewski, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.