ŠTEKELIS, Kristiāns. Noise Level Measuring Options and Their Use in Technological Processes. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 78–82, 2015. DOI: 10.17770/etr2013vol1.831. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/831.. Acesso em: 3 may. 2024.