Green Scheduling of Jobs and Flexible Periods of Maintenance in a Two-Machine Flowshop to Minimize Makespan, a Measure of Service Level and Total Energy Consumption. - Sadiqi Assia; Ikram El Abbassi; Abdellah Elbarkany; Moumen Darcherif; Ahmed El Biyaali (Adv. Oper. Res., 2020)