M. Takács and J. Oláh, “Differences in the volume of sunflower honey produced in 2015 based on the different types of beehives and queen bee’s age”, ANIM WELFARE ETOL TARTÁSTECHN, vol. 11, no. 2, pp. 185–192, Dec. 2015, doi: 10.17205/SZIE.AWETH.2015.2.185.