Thum, C.K.; Du, C.; Lewis, F.L.; Chen, B.M.; Ong, E.H.: 'H disturbance observer design for high precision track following in hard disk drives', IET Control Theory & Applications, 2009, 3, (12), p. 1591-1598, DOI: 10.1049/iet-cta.2008.0317 IET Digital Library, https://digital-library.theiet.org/;jsessionid=3d6rr1saed9qs.x-iet-live-01content/journals/10.1049/iet-cta.2008.0317