1. Anonymous, (2018).https://www.statista.com/statistics/267271/worldwide-oilseed-production-since-2008/
2. Arya, DR., Sihag, RC., Yadav, PR. (1994). Diversity, abundance and foraging activity of insect pollinators of sunflower (Helianthus annuus L.) at Hisar (India).Indian Bee J. 56: 172-178.
3. Burney, K., Ahmad, I., Aslam, M. (1990).Charcoal rot and important disease of sunflower and its control.Prog.Farming. 10: 34-36.
4. Calderone, NW. (2012). Insect pollinated crops, insect pollinators and US agriculture: trend analysis of aggregate data for the period 1992–2009. PLoS ONE. 7(5): e37235. https://doi.org/10.1371/journal.pone.0037235
5. Calmasur, O., Ozbek, H. (1999). Pollinator bees (Hymenoptera: Apoidea) on sunflower (Helianthus annuus L.) and their effects of seed setting in the Erzurum region. Turk J. Biol. 23: 73-87.