1. Free translation of excerpt from: Brodskij I (1991) Fondamenta degli Incurabili, Adelphi, Milan
2. Davis PJ (1993) Spirals: From Theodorus to Chaos. A K Peters Ltd.
3. Free translation of excerpt from: Sinopoli G (1991) Parsifal in Venice, Consorzio Venezia Nuova, Venice
4. Free translation of excerpt from: Eliade M (1980) L’Epreuve du Labyrinthe, Paris, 1978; p. 169 of Italian edition
5. Kerényi K (1983) Nel Labirinto, Boringhieri, Turin