Umberto Eco
Cirlot Juan Eduardo
Oxford
Herder .
Real Academia Española
Rae
Aa.Vv.
Larousse
Academia Argentina De Letras
Junichi Matsuura, Lourdes Porta Fuentes
Oscar Conde
Jacques Le Goff, Jean Claude Schmitt
Nicola Abbagnano
Real Academia Espanola
Christine Harrauer, Herbert Hunger
James Flath, Ana Orenga, Carlos Rubio, Hiroto Ueda
Yoko Nakazawa
Kinder H. Y Hilgemann W.