Are there pheromonal dominance signals in the bumblebee Bombus hypnorum L (Hymenoptera, Apidae)? M. Ayasse, T. Marlovits, J. Tengö, T. Taghizadeh and W. Francke Apidologie, 26 3 (1995) 163-180 DOI: 10.1051/apido:19950301