http://en.wikipedia.org/wiki/Gyrator

http://inst.eecs.berkeley.edu/~ee100/su07/handouts/ChuaNotesFall04/ChuaFall04_Gyrator_Guide.pdf

http://www.falstad.com/circuit/e-gyrator.html

http://www.beigebag.com/case_gyrator.htm

http://en.wikipedia.org/wiki/Negative_impedance_converter

http://www.falstad.com/circuit/e-nic-r.html

http://www.google.com/url?sa=t&rct=j&q=generalized%20impedance%20converter&source=web&cd=9&cad=rja&ved=0CGcQFjAI&url=http%3A%2F%2Fdownloads.hindawi.com%2Fjournals%2Fapec%2F2002%2F174936.pdf&ei=YF35UIrdC4KqrAeNvoDwBQ&usg=AFQjCNGnFFMo7CGG3-qFMJKegh55ZB6a_w

http://mysite.du.edu/~etuttle/electron/elect66.htm

http://www.ee.nmt.edu/~rhb/spr05-ee212/lab/lab06.html

http://www.matheonics.com/Tutorials/Introduction.html