1. PID Controllers: Theory, Design, and Tuning;Astrom,1995
2. The linear multivariable regulator problem;Francis;SIAM Journal on Control and Optimization,1977
3. V. Gavrilets, B. Mettler, E. Feron, Dynamic model for a miniature aerobatic helicopter, MIT-LIDS report, no. LIDS-P-2580, 2003.
4. Evolutionary design of a helicopter autopilot;Hoffmann,1999
5. Soft computing and hybrid approaches: an introduction to this special issue;John;Information Sciences,2003