Al Awaji، H. A. S.، و Sture، S. (1990). Formulation and Integration of Constitutive Relations in Soil Plasticity Under Mixed Control for Drained and Undrained Conditions (رسالة دكتوراه غير منشورة). University of Colorado، بولدر. مسترجع من http://search.mandumah.com/Record/617503
Al Awaji، Hussain A. S.، و Stein Sture. "Formulation and Integration of Constitutive Relations in Soil Plasticity Under Mixed Control for Drained and Undrained Conditions" رسالة دكتوراه. University of Colorado، بولدر، 1990. مسترجع من http://search.mandumah.com/Record/617503