2. http://home.online.no/~justlop/folkmusic/instrument.htm
3. http://www.hfaa.org
4. http://www.hfaa.org/archives/hoksnes01.shtml
5. http://w1.2701.telia.com/~u270100165/Fiddle.htm
6. http://www.jewsharpguild.org/history.html
7. http://www.fono.no/folknettnorway/about%20the%20music.htm
8. http://members.aol.com/jglittle/ncsnlsf972.html
9. http://www.jewsharpguild.org/_disc1/00000031.htm
10. Grinde, Nils. A History of Norwegian Music. Trans. William. H. Halverson and Lelan B. Sateren. Lincoln: Univ. of Nebraska Press. 1991.
11. http://www.nyckelharpa.org
12. http://user.tninet.se/~rbu642q/hedin/johan_hedin_int.html
13. http://www.britannica.com/seo/p/polska/
14. http://viking.no/e/life/music/e-musikktyper.html