Dr. Mohamed El Naschie, 17 Dec 2014 http://link.springer.com/chapter/10.1007%2F978-94-009-2125-2_10 link.springer.com
Mohamed Naschice, 17 Dec 2014 http://link.springer.com/chapter/10.1007%2F978-94-009-2125-2_10 link.springer.com