1. Bell, L. A. 1983. Papyrus, tapa, amate and rice paper: papermaking in Africa, the Pacific, Latin America and Southeast Asia. Liliaceae Press, McMinnville, OR.
2. Christensen, B. 1942. Notas sobre la fabricatión del papel indígena y su empleo para “brujerías” en la Sierra Norte de Puebla. Rev. Mex. Est. Antropol. 4:109–124.
3. —. 1963. Bark paper and witchcraft in Indian Mexico. Econ. Bot. 17:360–367.
4. -, and S. Martí. 1971. Witchcraft and pre-Columbian paper. Ediciones Euroamericanas, Mexico, D.F.
5. Codex Mendoza. 1938. The Mexican manuscript known as the Collection of Mendoza and preserved in the Bodleian Library. 3 vols. Waterlow and Sons, London.