R. Gabryelczyk, „Does Grade Level Matter for the Assessment of Business Process Management Maturity?“, OE, let. 62, št. 2, str. 3–11, jul. 2016, Pridobljeno: 13. januar 2026. [Na spletu]. Dostopno na: https://old.journals.um.si/index.php/oe/article/view/2232