Tham khảo Quỹ đạo nghiệm số

  1. Kuo 1967, tr. 332.
  2. Evans, Walter R. (1965), Spirule Instructions, Whittier, CA: The Spirule Company 
  3. Evans, W. R. (tháng 1 năm 1948), “Graphical Analysis of Control Systems”, Trans. AIEE 67 (1): 547–551, ISSN 0096-3860, doi:10.1109/T-AIEE.1948.5059708 
  4. Evans, W. R. (tháng 1 năm 1950), “Control Systems Synthesis by Root Locus Method”, Trans. AIEE 69 (1): 66–69, ISSN 0096-3860, doi:10.1109/T-AIEE.1950.5060121 

Tài liệu tham khảo

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