Péntek-Zakar, Erika, András Jávor, and Szilvia Kusza. “Study the Correlation of Morphological and Production Traits of Honey Bee (Apis Mellifera L.) (Review”. Acta Agraria Debreceniensis, no. 57 (March 20, 2014): 61–65. Accessed December 2, 2021. https://ojs.lib.unideb.hu/actaagrar/article/view/1961.