mikelsone.elina@gmail.com
aivars.spilbergs@ba.lv
jean-pierre.segers@rtu.lv
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© 2022 Elina Mikelsone, Aivars Spilbergs, Jean-Pierre Segers, Janis Frisfelds, published by EKA University of Applied SciencesThis work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.