EMAD SAAD AL-DEEN, Afreen. Absorbs Heat from Outside Air and Release it inside the Building by Heat Pump. Journal of Engineering and Sustainable Development, Baghdad, Iraq, v. 15, n. 4, p. 189–204, 2011. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1319.. Acesso em: 20 apr. 2025.