Higher vitellogenin concentrations in honey bee workers may be an adaptation to life in temperate climates - Amdam, G. V.; Norberg, K.; Omholt, S. W.; Kryger, P.; Lourenço, A. P.; Bitondi, Márcia Maria Gentile; Simões, Zilá Luz Paulino (Insectes Sociaux, 2005)