Konferenzbeitrag
Scheuerlein, A.; Gwinner, E.: Proximate and ultimate aspects of photoperiodic sensitivity in equatorial Stonechats Saxicola torquata axillaris. In: Proceedings of the 22nd International Ornithological Congress, S. 1756 - 1766 (Hg. Adams, N. J.; Slotow, R. H.). 22nd International Ornithological Congress, Durban, 16. August 1998 - 22. August 1998. Birdlife South Africa, Johannesburg (1999)