1. Adler, H. E. (1970): Ontogeny and phylogeny of orientation. In: Development and Evolution of Behavior: Essays in Memory of T. C. Schneirla. L. R. Aronson et al. eds. W. H. Freeman, San Francisco: 303–336.
2. Alerstam, T. &S.-G. Petterson (1976): Do birds use waves for orientation when migrating across the sea? Nature 259: 205–207.
3. Barlow, J. S. (1964): Inertial navigation as a basis for animal navigation. J. theor. Biol. 6: 76–117.
4. Benvenuti, S., V. Fiaschi, L. Fiore &F. Papi (1973): Disturbances of homing behavior in pigeons experimentally induced by olfactory stimuli. Monit. Zool. Ital. 7, 117–128.
5. Bellrose, F. C. (1967): Orientation in water-fowl migration. In: Animal Orientation and Navigation. R. M. Storm ed. Oregon State University press, Corvallis: 73–100.