1. Bently Nevada Corporation, 3360/61 Dual Vector Monitor, 1999, pp. 1–7.
2. Bently Nevada Corporation, Shaft Crack Detection using the Acceptance Region, Orbit, 1987, August, p. 17.
3. The power of position;Kaplan;Machine Plant & Systems Monitor,1999
4. D. Puri, T. Pyne, M.V. Tipre, A.S. Chandajkar, Refinery fuel gas compressor—a case study on vibration diagnostics & solution, Proceedings of HIMER National Conference, 2001, pp. 1–12.
5. The ordering of multivariate data;Barnett;Journal of Royal Statistical Society—Series A,1976