FELIACHI, Ali. Challenges for Future Flexible Electric Power Systems. ENP Engineering Science Journal, [S. l.], v. 1, n. 1, p. 1–7, 2021. DOI: 10.53907/enpesj.v1i1.8. Disponível em: //enpesj.enp.edu.dz/index.php/enpesj/article/view/8. Acesso em: 28 dec. 2025.