Zeitschriftenartikel
Visser, M. E.; Caro, S. P.; van Oers, K.; Schaper, S. V.; Helm, B.: Phenology, seasonal timing and circannual rhythms: Towards a unified framework. Philosophical Transactions of the Royal Society of London, Series B: Biological Sciences
365 (1555), S. 3113 - 3127 (2010)