FARDIGOLA, L. V. Controllability problems for the wave equation on a half-plane and modified Sobolev spaces . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 9, p. 18–24, 2025. DOI: 10.15407/dopovidi2015.09.018. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/15214. Acesso em: 19 apr. 2026.