Hadžibegović, Zalkida, and Semira Galijašević. “100 Years Anniversary of the Bohr Model of the Atom: How Chemistry Freshmen Understand Atomic Structure of Matter”. Bulletin of Chemists and Technologists of Bosnia and Herzegovina, vol. 40, June 2013, pp. 51-56, https://glashem.pmf.unsa.ba/index.php/bctbh/article/view/107.