Stochastic decision-making optimization model for large electricity self-producers using natural gas in industrial processes: an approach considering a regret cost function - Leonel, Lais Domingues; Balan, Mateus Henrique; Camargo, Luiz Armando Steinle; Ramos, Dorel Soares; Castro, Roberto; Clemente, Felipe Serachiani (Energies, 2024)