Speed scaling technique integrated in scheduling of production and maintenance under energy constraints using genetic algorithmsSadiqi Assia, El Abbassi Ikram, El Barkany Abdellah, Darcherif Moumen and El Biyaali AhmedE3S Web Conf., 170 (2020) 01029DOI: https://doi.org/10.1051/e3sconf/202017001029