Foraging behavior and pollinating effectiveness of Osmia cornuta (Hymenoptera: Megachilidae) and Apis mellifera (Hymenoptera: Apidae) on “Comice” pear Víctor H. Monzón, Jordi Bosch and Javier RetanaApidologie, 35 6 (2004) 575-585DOI: https://doi.org/10.1051/apido:2004055
