http://www.doe.carleton.ca/~rmason/Teaching/486-a.pdf

http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-012-microelectronic-devices-and-circuits-fall-2005/lecture-notes/lecture21annotat.pdf

http://www.allaboutcircuits.com/worksheets/multiamp.html

http://surf.hep.upenn.edu/~kroll/p364_fall09/handouts/multistage_amplifier.pdf

http://users.ece.gatech.edu/mleach/ece3050/notes/feedback/FBExamples.pdf

http://en.wikipedia.org/wiki/Negative_feedback_amplifier#Classical_feedback

http://www.ece.mtu.edu/faculty/goel/EE-4232/Feedback.pdf

http://www.eee.metu.edu.tr/~askar/EE311/2009/EE311-2009-THE11.pdf