Dizdarević V. in Volčjak R. (2012) „Convergence of Business Cycles as A Confirmation of Oca Theory“, Naše gospodarstvo/Our economy, 58(3-4), str. 3-15. Dostopno na: https://old.journals.um.si/index.php/oe/article/view/2328 (Pridobljeno: 26september2025).