When searching for scientific papers there are plenty of free-access resources on the Internet. On this page Graz Medical University Library provides you with an extensive link collection.
For testing and validation of medical contents on the Internet there are verified quality standards as developed and assigned e.g. by Aktionsforum Gesundheitsinformationssystem – afgis and several quality seals as e.g. HON-Code. A website certified by this institution meets criteria which ensure the quality of provided information.