Authors
Ana Letícia B. F. Lemos
Federal Rural University of Pernambuco,, Pernambuco, Brazil
Linda Kauškale
Riga Technical University,, Riga, Latvia
© 2017 Ana Letícia B. F. Lemos, Linda Kauškale, published by Riga Technical University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.