1. 1. Informs.org [web page on the Internet]. Hanover (MD): The Institute for Operations Research and the Management Sciences; c2007. [cited 2008 Oct 20]. Available from: http://www.scienceofbetter.org.
2. 2. The Association of European Operational Research Societies [web page on the Internet]. Brussels: The Association; [updated 2008 Oct 16; cited 2008 Oct 20]. Available from: http://www.euro-online.org.
3. Perishable inventory theory: a review;Nahmias;Manage Sci,1984
4. Blood platelet production: a novel approach for practical optimization;van Dijk;Transfusion