SHULGA, G.; SHAKELS, V.; SKUDRA, S.; BOGDANOVS, V. Modified Lignin as an Environmentally Friendly Surfactant. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 276–281, 2015. DOI: 10.17770/etr2011vol1.919. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/919.. Acesso em: 28 apr. 2024.