Mueller, M.A.; Baker, N.J.; Ran, L.; Chong, N.G.; Hong Wei, ; Tavner, P.J.; McKeever, P.: 'Experimental tests of an air-cored PM tubular generator for direct drive wave energy converters', IET Conference Proceedings, 2008, p. 747-751, DOI: 10.1049/cp:20080621
IET Digital Library, https://digital-library.theiet.org/;jsessionid=y7vyy2q6qfrw.x-iet-live-01content/conferences/10.1049/cp_20080621