Majić, Zvonimir, Irena Jukić, Tomislav Vuk, and Stanislav Pavlin. “Research of the Influence of Air Transportation on Blood Sample Quality”. Promet - Traffic & Transportation 23, no. 6 (February 21, 2012): 431-442. Accessed October 22, 2019. http://traffic.fpz.hr/index.php/PROMTT/article/view/178.