Photothermal characterization of the gelation process in Gelidium robustum Agar Y. Freile-Pelegrín, J. Bante, J.J. Alvarado-Gil et J.M. Yánez-Limón J. Phys. IV France, 125 (2005) 821-824 DOI: 10.1051/jp4:2005125189