Paliza, O., A. Clarke, S. Clarke, and G. Clarke. “Dr. Robert Henry Clarke, Oceanographer, M.A. (Oxon), Dr. Philos. (Oslo), 1919-2011”. Latin American Journal of Aquatic Mammals, vol. 9, no. 1, Mar. 2013, pp. 2-7, doi:10.5597/lajam00171.