Reactive pellets for improved solar hydrogen production based on sodium manganese ferrite thermochemical cycle, Alvani, C., Bellusci M., Barbera A.L., Padella F., Pentimalli Marzia, Seralessandri L., and Varsano F. , 2008 Proceedings of the 2nd International Conference on Energy Sustainability, ES 2008, Volume 2, Number 3, Jacksonville, FL, p.385-390, (2009)