1. http://en.wikipedia.org/wiki/Franz_Schubert#Final_illness_and_death2. http://w3.rz-berlin.mpg.de/cmp/schubert.html3. http://home1.swipnet.se/~w-18046/slife.html4. http://www.answers.com/topic/franz-schubert5. http://www.geocities.com/Vienna/Strasse/9556/index.html