Grajales-Conesa, J.; Meléndez-Ramírez, V.; Cruz-López, L.; Sánchez, D. Native Bees in Blooming Orange (Citrus Sinensis) and Lemon (C. Limon) Orchards in Yucatán, Mexico. Acta Zool. Mex. (n.s.) 2013, 29, 437-440.