1. Aoki Y, Scholz C (2003) Vertical deformation of the Japanese Islands, 1996–1999. J Geophys Res 108(B5): ETG 10–1 doi: 10.10292002JB002129
2. Aravind PK (1988) Geometrical interpretation of the simultaneous diagonalization of two quadratic forms. Am J Phys 57(4): 309–311
3. Beavan J, Matheson D, Denys P, Denham M, Herring T, Hager B, Molnar P (2004) A vertical deformation profile across the southern Alps, New Zealand, from 3.5 years of continuous GPS data. In: Proceedings of the workshop: the state of GPS vertical positioning precision: separation of Earth processes by space geodesy, Cahiers du Centre Européen de Géodynamique et de Séodmologie, vol 24, pp 111–123
4. Cai J (2004) Statistical inference of the eigenspace components of a symmetric random deformation tensor. Ph.D. thesis, Institute of Geodesy, Universität Stuttgart, Germany
5. Cai J, Grafarend EW, Schaffrin B (2005) Statistical inference of the eigenspace components of a two-dimensional, symmetric rank-two random tensor. J Geod 78(7–8): 425–436 doi: 10.1007/s00190-004-0405-2