Economic importance of honey bee pollination of props at the national 12 level of Hungary, 29th International Apiculture Congress: Apimondia, pp.286-289, 1983. ,
Evaluation de l'incidence économique de l, p.14, 1984. ,
Essai d'une évaluation de l'incidence économique de l'abeille 16 pollinisatrice dans l'agriculture européenne, Apiacta, vol.24, pp.33-38, 1989. ,
The economic value of bees in the UK, Bee World, vol.11, issue.2, pp.115-133, 1998. ,
DOI : 10.1080/0005772X.1986.11098871
The movement of honey bee colonies for crop pollination and honey production by beekeepers in Great Britain, Bee World, vol.110, issue.1, pp.67-77, 1997. ,
DOI : 10.1017/S0021859600078989
The Value of 26 the world's ecosystem services, Nature, vol.387, pp.253-260, 1997. ,
Using bumblebees to improve almond pollination by the Ghazoul Recognizing the complexities of ecosystem management and the 12 ecosystem service concept, J, vol.16, pp.215-221, 2006. ,
Wild bees enhance honey bees' pollination of hybrid 14 sunflower, Proceedings of the National Academy of Sciences USA 103, pp.13890-13895, 2006. ,
Price Linkage and Transmission between Shippers and 16, 2001. ,
Importance of pollinators in changing landscapes for world 19 crops, Proceedings of the Royal Society, pp.303-313, 2007. ,
Crop pollination from native bees at risk 21 from agricultural intensification, Proceedings of the National Academy of Sciences USA 22 99, pp.16812-16816, 2002. ,
Value of bee pollination to United State agriculture, 1984. ,
The Economic Value of Ecological Services Provided by Insects, BioScience, vol.56, issue.4, pp.311-323, 2006. ,
DOI : 10.1641/0006-3568(2006)56[311:TEVOES]2.0.CO;2
The use of bees for crop pollination The 28 hive and the honey bee, In: Dadant & Sons, pp.579-614, 1975. ,
Insect pollination of cultivated crop plants Agriculture Handbook, p.30, 1976. ,