SONG, X.; YUAN, C.; ZHANG, Y.; LI, Q.; LI, Z. A New Numerical Modelling Method for System Energy Efficiency Calculation. Elektronika ir Elektrotechnika, [S. l.], v. 24, n. 6, p. 55-59, 2018. DOI: 10.5755/j01.eie.24.6.21520. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/21520. Acesso em: 24 oct. 2020.