Citation:

http://www.biography.com/people/gregor-mendel-39282#synopsis

http://www.britannica.com/EBchecked/topic/374739/Gregor-Mendel/4790/Education-and-early-career

http://www.famousscientists.org/gregor-mendel/

http://blog.scs.sk.ca/bblack/2012/03/10_facts_about_gregor_mendel.html

http://t.answers.com/answers/#!/entry/what-did-gregor-mendel-die-of,500b92db7af68a84dc27ab70/2