Atieg، A. A. A.، و Watson، G. A. (2005). Numerical Methods for Fitting Curves and Surfaces to Data by Orthogonal Distance Regression and some Generalizations (رسالة دكتوراه غير منشورة). University of Dundee، دندي. مسترجع من http://search.mandumah.com/Record/609367
Atieg، Abd Allah A.M.، و G. A. Watson. "Numerical Methods for Fitting Curves and Surfaces to Data By Orthogonal Distance Regression and Some Generalizations" رسالة دكتوراه. University of Dundee، دندي، 2005. مسترجع من http://search.mandumah.com/Record/609367