Alonso del Rosario, J. J., J. M. Vidal Pérez, J. Pérez Serrano, and J. C. Mendoza Sánchez. “Exploitation of Tidal Power in the Bay of Cadiz: Ancient Tidal Mills”. Scientia Marina, vol. 70, no. 1, Mar. 2006, pp. 21-30, doi:10.3989/scimar.2006.70n121.