Vignaud, Henry (1902). Toscanelli and Columbus. London: Sands & Co. s. 61–62. Besøkt 29. desember 2020.
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Grewe, Wilhelm G. (2000). The epochs of international law. Berlin / New York: De Gruyter. s. 229–233. ISBN3110153394. Besøkt 29. desember 2020. «In the course of this struggle it became obvious that the Spanish attempt to preserve fundamental aspects of the medieval law of nations was no longer tenable. Confronted with the over-whelming opposition of most other European States, in particular the Protestant ones, the Spanish endeavoured forthwith to find other legal titles for their new possessions overseas. Thus, in the first half of the sixteenth century they had already stopped asking for a papal sanction of the Hispano-Portuguese demarcation line in the Pacific Ocean; the right of discovery moved to the foreground and a Spanish jurist as eminent as Vitoria stated that the popes did not intend to dispose of the new world as such, but only to draw the limits of the missionary regions. The Spanish crown, however, never renounced its rights deriving from the papal bulls and always remained eager to leave open their widest possible interpretation.»
Diffie, Bailey W. & Winius, George D. (1985): Foundations of the Portuguese empire 1415-1580, bind I, University of Minnesota Press, s. 152. Sitat: «In a war in which the Castilians were victorious on land and the Portuguese at sea, ...»
Newitt, Malyn (2005): A history of Portuguese overseas expansion, 1400-1668, Routledge, New York, s. 39-40. Sitat: «All things considered, it is not surprising that the Portuguese emerged victorious from this first maritime colonial war. They were far better organised than the Castilians, were able to raise money for the preparation and supply of their fleets and, and had clear central direction from ... [Prince] John.»
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Diffie, Bailey W. & Winius, George D. (1985): Foundations of the Portuguese empire 1415-1580, bind I, University of Minnesota Press, s. 152. Sitat: «In a war in which the Castilians were victorious on land and the Portuguese at sea, ...»
