1. T. Coughlin, Progress In HDD Areal Density, Forbes, Enterprise Tech., Jun 28, 2015 https://www.forbes.com/sites/tomcoughlin/2015/06/28/progress-in-hdd-areal-density/?sh=5fb9f2761671.
2. Magnetic recording systems;Wood;Proc. IEEE,1986
3. Consumer: Video tape: Options for the buyer;Mennie;IEEE Spectrum,1978
4. T. J. Cameron, Method and Apparatus for overlapping data tracks on a storage Medium, US Patent 6,185,063, Feb 6th, 2001.
5. P. Kasiraj, M. Williams, System and method for writing HDD depending on head skew, US Patent 6,967,810 B2, Nov 22nd, 2005.