NAJMAN, R. Nonlinear Aspects of Heat Pump Utilization. Acta Polytechnica, Prague, Czech Republic, v. 50, n. 4, 2010. DOI: 10.14311/1237. Disponível em: https://ojs.cvut.cz/ojs/index.php/ap/article/view/1237. Acesso em: 3 apr. 2025.