Toluidine blue staining as a rapid measure for initiation of oocyte growth and fertility in Varroa jacobsoni Oud Claudia Garrido, Peter Rosenkranz, Matthias Stürmer, Ralph Rübsam and Jürgen BüningApidologie, 31 5 (2000) 559-566DOI: https://doi.org/10.1051/apido:2000146