Development of hypopharyngeal glands in adult honey bees fed with a Bt toxin, a biotin-binding protein and a protease inhibitor Louise A. Malone, Jacqui H. Todd, Elisabeth P.J. Burgess and John T. ChristellerApidologie, 35 6 (2004) 655-664DOI: https://doi.org/10.1051/apido:2004063