Emanuel, Jeff (2012), "Crown Jewel of the Fleet: Design, Construction, and Use of the Seagoing Balsas of the Pre-Columbian Andean Coast," in Proceedings of the 13th International Symposium on Boats and Ship Archaeology (ISBSA 13), Amsterdam, Netherlands, October 8–12, 2012, pp. 6-7, http://scholar.harvard.edu/emanuel/mbian-Balsa_ISBSA-13, accessed 2 Aug 2016