http://www.geocities.com/~jlhagan/K9-14/introduction.htm

http://www.elfwood.com/farp/theart/jesspencil/jesspencil.html

http://hubpages.com/hub/How-To-Make-Drawings-Using-A-Grid

http://www.onlypencil.com/blog/tutorials/drawing-the-human-eye/

http://www.onlypencil.com/blog/tutorials/drawing-the-human-eye/

http://www.artyfactory.com/portraits/drawing_techniques/drawing_the_eye.htm

http://www.portrait-artist.org/face/index.html

http://www.pencilportrait.org/