Jose Luis Caivano. 1993. “Symbolicity in elementary visual signs”, en Semiotics 1990 & Symbolicity, parte 2, Proceedings of the International Semioticians’ Conference in Honor of Thomas A. Sebeok’s 70th Birthday, ed. J. Bernard, J. Deely, V. Voigt, y G. Withalm (Lanham, Maryland: University Press of America, 1993, ISBN 0-8191-8868-9), pp. 46-55.
