Ptacek, V., Rotrekl, & J (2001). Landscape Pollination Management of Rhophitoides canus Ev. (Hymenoptera, Apoidea, Halictidae) in Seed Production of Alfalfa (Medicago sativa L.). Acta Horticulturae: VIII International Symposium on Pollination-Pollination: Integrator of Crops and Native Plant Systems, 561, 153-157.