1] Ivan Peronja ANALYSIS OF THE RETAIL PRICE CALCULATION AND THE IMPACT OF PRICE CHANGES IN THE MARKET DUE TO INTRODUCTION OF THE NEW VAT RATE IN CROATIA" - REDETE 2014 - Researching Economic Development and Entrepreneurship in Transition Economies, 24.01.2014.
(https://ekonferencije.com/sr1/rad/analysis-of-the-retail-price-c/2684)

2] Ivan Peronja PROCESS-ORIENTED ORGANIZATION OF PUBLIC UTILITY COMPANIES HAVE BETTER BUSINESS PERFORMANCE THAN FUNCTION ORIENTED ORGANIZATION" - REDETE 2011, 14.07.2011.
(https://ekonferencije.com/sr1/rad/process-oriented-organization-/809)