mara.pudane@rtu.lv
sintija.petrovica@rtu.lv
egons.lavendelis@rtu.lv
alla.anohina-naumeca@rtu.lv
© 2018 Mara Pudane, Sintija Petrovica, Egons Lavendelis, Alla Anohina-Naumeca, published by Riga Technical UniversityThis work is licensed under the Creative Commons Attribution 4.0 License.