1. Åström, K.J., Hägglund, T.: PID Controllers: Theory, Design, and Tuning. Instrument Society of America, North Carolina (1995)
2. Franklin, G.F., Powell, J.D., Emami-Naeini, A.: Feedback Control of Dynamic Systems, 5th edn. Prentice-Hall, New Jersey (2006)
3. Ogata, K.: Modern Control Engineering, 4th edn. Prentice-Hall (2002)
4. Malcher, A., Pietraszek, S., Przybyla, T., Kidon, Z.: Real time QRS detection based on field programmable analog array. J. Med. Inform. Technol. 13(2009), 183–188 (2009)
5. Zhang, W., Li, Y.: A self-adapted PID system based on intrinsic evolvable hardware. In: Proceedings of the International MultiConference on Engineers and Computers Scientists. Hong Kong, 19–21 Mar 2008