Time Scale Researchers http://web.umr.edu/~bohner/tslist.html
American Mathematical Society, http://www.ams.org
European Mathematical Society, http://www.emis.de
Egyptian Mathematical Society, http://msrc.etms-web.org,
Mathematics on the web
http://en.wikipedia.org/wiki/Main_Page
Ancient Egyptian of Mathematics
http://www-groups.dcs.st-and.ac.uk/~history/Indexes/Egyptians.html
Mansoura University http://www.mans.eun.eg
International Society of Difference Equations, http://web.umr.edu/~isde/
Science Direct http://www.sciencedirect.com/
African Mathematical Union, AMU,
http://www.math.buffalo.edu/mad/AMU/AMU-index.html
http://www.math.buffalo.edu/mad/PEEPS2/sakir_samir.html
International Union of Mathematics http://www.mathunion.org/
ICM - International Congress of Mathematicians
http://www.mathunion.org/ICM/index.html
