'Availability and its effect on the cost of marine energy' (Energy Engineering, 2017), 'Wave and Tidal Generation Devices: Reliability and availability', Chap. 7, pp. 131-140, DOI: 10.1049/PBRN018E_ch7
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1d8hif6t4ft3k.x-iet-live-01content/books/10.1049/pbrn018e_ch7