HDK

http://accad.osu.edu/~pete/Houdini/html/sop/class.html

Writing for String Quartet

Notes on writing for String Quartet

http://www.ymmd.org.uk/pages/eng_composer/Writing%20for%20String%20Quartet.pdf

http://www.asmac.org/templates/System/details.asp?id=39902&PID=478580
Study Ravel's String Quartet in F

http://www.rayashley.com/quartets.htm

Bela Bartok: Six String Quartets
Dmitri Shostakovich: 15 String Quartets

String Quartets: Given prominence by Joseph Hadyn