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conference: Proceedings of the National Academy of Sciences
"The Proceedings of the National Academy of Sciences (USA), mostly commonly referred to as PNAS, is the official publication of the National Academy of Sciences of the United States of America. It is a biweekly journal of all sciences, with a particular focus on the biological sciences. It is notable for its policy of making the full text of the articles freely available to all 6 months after the original publication date, conforming with the "open access" policy proposed by the Public Library of Science. Immediate full-text access (without the 6-month delay) is available in more than 130 developing countries. ", free onlineMore info of this article can be found on the web at:
http://www.pnas.org/