http://en.wikipedia.org/wiki/Arginine

http://www.nutriherb.net/l-arginine.html

http://www.arginineresearch.com/ClinicalBenefits.htm

http://www.nutrabio.com/Products/sub.amino_acids.htm

http://www.americannutrition.com/store/l-argininepg.html

http://www.americannutrition.com/store/amino_acids_arginine.html

http://www.nextag.com/amino-acid-arginine/search-html

http://www.primev.com/Arginine.htm

http://www.answers.com/topic/arginine

http://www.arginineaminoacid.info/