Optimization of biodiesel production from wet microalgal biomass by direct transesterification using the surface response methodology - Macías-Sánchez M.; Robles-Medina A.; Jiménez-Callejón M.; Hita-Peña E.; Estéban-Cerdán L.; González-Moreno P.; Navarro-López E.; Molina-Grima E. (Renewable Energy, 2018)