Effect of queen pheromone on worker bees of different ages: behavioural and electrophysiological responses M. H. Pham-Delègue, J. Trouiller, C. M. Caillaud, B. Roger and C. MassonApidologie, 24 3 (1993) 267-281DOI: https://doi.org/10.1051/apido:19930307