Taseska, M., P. Makreski, V. Stibilj, R. Jacimovic, and T. Stafilov. “Determination of Trace Elements in Hematite’s Iron Reference Material JSS-804-1 Using Ko-INAA”. Geologica Macedonica, Vol. 22, Apr. 2013, pp. pp.43-48, https://js.ugd.edu.mk/index.php/GEOLMAC/article/view/243.