« In A sense, Khwarizmi is more entitled to be called « the father of algebra » than Diophantus because Khwarizmi is the first to teach algebra in an elementary form and for its own sake, Diophantus is primarily concerned with the theory of numbers. » Progettiamo e realizziamo manifestazioni, http://www.drugoffice.gov.hk/gb/unigb/foliemolie.nl/