1. D. H. Klyde, D. T. McRuer and T. T. Myers, “Unified Pilot-Induced Oscillation Theory, Volume I: PI0 Analysis with Linear and Nonlinear Effective Vehicle Characteristics, Including Rate Limiting”, WL-TR-96-3028, December 1995.
2. P. Xu, Y. Ju, C. Qi and Y. Wang, “The analysis and the research of the helicopter PIO”, 2nd Joint International Information Technology, Mechanical and Electronic Engineering Conference (JIMEC 2017), Advances in Computer Science Research, volume 62, 2017.
3. ARISTOTEL (Aircraft and Rotorcraft Pilot Couplings – Tools and Techniques for Alleviation and Detection), ACPO-GA-2010-266073, Deliverable 1.1, “Background, definition, and Classification of ARPC”, 2010.
4. Adverse rotorcraft pilot couplings—Past, present and future challenges
5. G. E. Cooper and R.P. Jr. Harper, “Use of Pilot Rating in the Evaluation of Aircraft Handling Qualities”, NASA TN D-5153, April 1969.