1. Batschelet, E.: Statistical methods for the analysis of problems in animal orientation and certain biological rhythms. Washington, D.C.: American Institute of Biological Sciences 1965
2. Benvenuti, S., Fiaschi, V., Fiore, L., Papi, F.: Disturbances of homing behavior in pigeons experimentally-induced by olfactory stimuli. Monit. zool. ital. (N.S.)7, 117?128 (1973)
3. Burr, E.J.: Small-sample distributions of the two-sample Crámer-von Mises'W 2 and Watson'sU 2. Ann. Math. Stat.35, 1091?1098 (1964)
4. Keeton, W.T.: Release-site bias as a possible guide to the ?map? component in pigeon homing. J. comp. Physiol.86, 1?16 (1973)
5. Keeton, W.T.: Pigeon homing: No influence of outward-journey detours on initial orientation. Monit. zool. ital. (N.S.)8, 227?234 (1974)