About this article
Published Online: May 17, 2014
Page range: 41 - 54
DOI: https://doi.org/10.2478/lpts-2014-0012
Keywords
© by G. Springis
This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Springis, G.
Rudzitis, J.
Avisane, A.
Leitans, A.