Cortesão, Jaime (1975). Esparsos, Volume III. Coimbra: Universidade de Coimbra Biblioteca Geral. p. 288. "...passing the island of 'Balle', on whose heights the nau Sabaia, of Francisco Serrão, was lost" – from Antonio de Abreu, and in João de Barros and Antonio Galvão's chronicles. [1]
