Al-Bhayrat, R. . “The Effectiveness of Training Based on the Principles of the Theory of Trees for Solving Problems in Providing High School Students in Jordan With the Skills of Inventive Thinking”. Dirasat: Educational Sciences, vol. 48, no. 4, Dec. 2021, pp. 145-64, http://dsr.ju.edu.jo/djournals/index.php/Edu/article/view/2928.