1. Källström, C.G.: ‘Identification and adaptive control applied to ship steering’, 1979, PhD, Lund Institute of Technology p. 192 also available in SSPA report, 1982
2. Nomoto, K.: ‘Response analysis of manoeuvrability and its application to ship design’, Inoue, S., , et al. (Eds.) Research on the manoeuvrability of ships in Japan, 60th Anniversary Series, Vol. 11(Society of Naval Architects of Japan Tokyo 1966), p. 17–59