1. A theory of the amplitude of free and forced triode vibrations;van der Pol;Radio Review,1920
2. Die Kunst das menschliche Leben zu verlängern;Hufeland,1797
3. The Dance Language and Orientation of Bees;Frisch,1967
4. Experiments on bird orientation;Kramer;Ibis,1952
5. Circadian and circannual programmes in avian migration;Gwinner;J. Exp. Biol.,1996