Penčić- Popović, Biljana, Vera Ćelić, Zoran Ćosić, Milena Pavlović- Kleut, Zorica Čaparević, Nada Kostić, Branislav Milovanović, Aleksandra Šljivić, and Biljana Stojčevski. 2014. “Heart Rate Variability and Increased Risk for Developing Type 2 Diabetes Mellitus”. Vojnosanitetski Pregled 71 (12). https://doi.org/10.2298/2800.