buscando buscando..........................

http://www.sciencedirect.com/science?_ob=HomePageURL&_method=userHomePage&_lg=Y&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=6b8f8a0bb11c4ebe676f09e6d7da52c8

http://hyper.ahajournals.org/