Adjaloo MK, Yeboah-Gyan K (2003). Foraging of the African honeybee, Apis mellifera Adanisoni, in the humid semi deciduous forest environment of Ghana. J. Sci. Technol. 23(1).

Adel MR, Namaghi HS, Hosseini M (2013). Effects of insect pollinators on onion seed production quality and quantity. J. Crop Prot. 2(4):395-402.

Awraris GS (2009) Behavioural response of honeybees (Apis mellifera scutellata Lep.) to wild pollinators on sunflowers (Helianthus annuus L.). Submitted in partial fulfillment of the requirements for the degree Master of Science (Agric): Entomology. In the Faculty of Natural and Agricultural Sciences University of Pretoria Pretoria.

Breeze TD, Bailey AP, Balcombe KG, Potts SG (2006). Pollination services in the UK: how important are honeybees? Agric. Ecosyst. Environ. 142(3-4):137-143.
Crossref

Devkota FR, Thapa RB (2005). Foraging preference of Apis cerana and Apis mellifera l. To broccoli under caged and open conditions in chitwan. J. Inst. Agric. Anim. Sci. 26:167-168.

Dhurve SS (2008). Impact of honey bee pollination on seed production of Guizotia abyssinica. M.Sc. Thesis. Dharwad University of Agricultural Sciences, India.

Free JB (1993). Insect Pollination of Crops. Academic Press, London, UK.

Jacobs FJ, Simoens C, Graaf DC de, Deckers J (2006). Scope for non-wood forest products income generation from rehabilitation areas: focus on beekeeping. J. Drylands 1(2):171-185.

Kunjwa N, Kumar Y, Khan MS (2014). Flower-visiting insect pollinators of Brown Mustard, Brassica juncea (L.) Czern and coss and their foraging behavior under caged and open pollination Afr. J. Agric. Res. 9(16)1278-1286. 2014.

Mattu VK, Hem Raj, Thakur ML (2012). Foraging behavior of honeybees on apple crop and its variation with altitude in Shimla Hills of western Himalaya. Int. J. Sci. Nat. 3(1):296-301.

Nascimento DL do, Nascimento FS (2012). Extreme effects of season on foraging activities and colony productivity of a stingless bee (Meleponaasilavai Moure, 1971) in Northeast. J. Entomol. pp. 267-361.

Sabara HA, Winston ML (2003). Managing honey bees (Hymenoptera: Apidae) for greenhouse tomato pollination. J. Econ. Entomol. 96(3):547-54.
Crossref

Sattigi HN, Kambrekar DN, Gundannavar KP, Kulkarni K A (2004). Effect of bee pollination on the yield parameters of Niger arnataka. J. Agric. Res. 17(4):831-832.

Verma LR, Partap U (2010). Foraging behaviour of Apis cerana on cauliflower and cabbage and its impact on seed production. J. Agric. Res. 33 (4):231-236.

Weiss EA (2000). Oil seed crops. Second edition. Blackwell Science Ltd. pp. 229-231.