'Operational experience and lessons learnt' (Energy Engineering, 2017), 'Wave and Tidal Generation Devices: Reliability and availability', Chap. 10, pp. 163-175, DOI: 10.1049/PBRN018E_ch10
IET Digital Library, https://digital-library.theiet.org/;jsessionid=g0dr66u8sdem.x-iet-live-01content/books/10.1049/pbrn018e_ch10