1. H. Takano, Y. Nishida, M. Futamoto, H. Aoi, Y. Nakamura, Possibility of 40Gb/in2 perpendicular recording, IEEE Inter-mag Conference (AD-06), April 10–13, 2000, Toronto, Canada.
2. Read-Rite and Samsung Electronics Record 60 Billion Bits per Square Inch Using Perpendicular Magnetic Recording, http://www.readrite.com/html/whatnew/101600a.html, Press release from Read-Rite Corp. on October 16, 2000.
3. SNR and density limit estimates: a comparison of longitudinal and perpendicular recording
4. The feasibility of magnetic recording at 1 Terabit per square inch
5. R. Victora, National Storage Industry Consortium Winter Meeting, Jan. 12–14, 2000, San Diego, CA.