[1]
Wille, A. 1970. Notes on the morphology of the musculature of the salivary syringe and neck region of bees. Revista de Biología Tropical. 18, 1-2 (Dec. 1970), 33–51. DOI:https://doi.org/10.15517/rev.biol.trop. v18i1-2.28031.