About this article
Published Online: May 08, 2018
Page range: 80 - 84
Received: Jan 31, 2017
Accepted: Oct 29, 2017
DOI: https://doi.org/10.2478/prolas-2018-0013
Keywords
© 2018 Māra Kūka et al., published by De Gruyter Open
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Kūka, Māra
Latvia University of Life Sciences and TechnologiesJelgava, Latvia
Čakste, Ilze
Latvia University of Life Sciences and TechnologiesJelgava, Latvia
Kūka, Pēteris
Latvia University of Life Sciences and TechnologiesJelgava, Latvia