• Mạng giáo dục

http://edu.net.vn/media/

• Mathematical Association of America

http://www.maa.org/

• American Mathematical Society

http://www.ams.org/bookstore/mathsciprice

 http://www.clarku.edu/research/sciencelibrary/databases/mathcs.cfm

• Free database of world links and unlimited resources

http://www.dir.info/Top/Science/Math