a_grigorev@mail.ru
lysenko_av@bk.ru
kipra@mail.ru
Vladimir_roganov@mail.ru
Jurijs.Lavendels@.rtu.lv
© 2018 Alexey Grigorev, Alexey Lysenko, Igor Kochegarov, Vladimir Roganov, Jurijs Lavendels, published by Riga Technical UniversityThis work is licensed under the Creative Commons Attribution 4.0 License.