Długosz M., Worniałło E., 1985. Variability of vendace (Coregonus albula L.) gonads in the annual cycle, in three lakes of Mazurian Lakeland. Acta Ichthyol. Piscat. 15 (2): 171-190.
In the lakes under study vendace was characterised by different duration of particular stages of male and female gonad development, and different periods of spawning.