R. Reyes-Tisnado, G. Hernández-Carmona, F. López-Gutiérrez, E. Vernon-Carter, and P. Castro-Moroyoqui, “Sodium and potassium alginates extracted from Macrocystis pyrifera algae for use in dental impression materials”, Cienc. Mar., vol. 30, no. 1B, pp. 189–199, Mar. 2004.