This site has a directory of doctors, publications, links to other sites, an ask the doctor section, and the SportsMed Journal. (
http://www.sportsmed.org/
)
This web site is an article that discusses the structure of skeletal muscle, types of contractions, muscle strains and regeneration, delayed onset muscle soreness (DOMS), and prevention and treatment of muscle injuries. At the end of the article there is also a reference list containing references from 18 journal articles and books. (
http://www.ajjf.org/article09.html
)