E. Spooner and M. Mueller, “Comparative Study of Linear Generators and Hydraulic Systems for Wave Energy Conversion,” ETSU V/06/00189/REP, DTI/Pub URN 01/783, United Kingdom, 2001. http://www.tridentenergy.co.uk/pdf/DTI%20Report.pdf
 R. Henderson, “Design, Simulation, and Testing of a Novel Hydraulic Power Take-off System for the Pelamis Wave Energy Converter, “ Renewable Energy, Vol. 31, No. 2, 2006, pp. 271-283. doi:10.1016/j.renene.2005.08.021
 G. Bacelli, J. Gilloteaux and J. Ringwood, “State Space Model of a Hydraulic Power Take off unit for Wave Energy Conversion Employing Bondgraphs,” Proceedings of the World Renewable Energy Conference, Glasgow, July 2008, pp. 1-4.