ØSTERGAARD, P. A.; LUND, H.; MATHIESEN, B. V. Smart energy systems and 4th generation district heating. International Journal of Sustainable Energy Planning and Management, Aalborg, Denmark, v. 10, p. 1–2, 2016. DOI: 10.5278/ijsepm.2016.10.1. Disponível em: https://journals.aau.dk/index.php/sepm/article/view/1527. Acesso em: 3 may. 2024.