Wallraff, H. G.; Kiepenheuer, J.: Relationships between initial orientation and subsequent homing of individual pigeons. Animal Behaviour 47 (4), pp. 821 - 832 (1994)
Kiepenheuer, J.; Neumann, M. F.; Wallraff, H. G.: Home-related and home-independent orientation of displaced pigeons with and without olfactory access to environmental air. Animal Behaviour 45 (1), pp. 169 - 182 (1993)
Wallraff, H. G.; Kiepenheuer, J.; Streng, A.: Further experiments on olfactory navigation and non-olfactory pilotage by homing pigeons. Behavioral Ecology and Sociobiology 32 (6), pp. 387 - 390 (1993)
Wallraff, H. G.; Kiepenheuer, J.; Neumann, M. F.; Sinsch, U.: Microclimatic origin of inhaled air affects olfactory navigation of homing pigeons. Experientia: interdisciplinary journal for the life sciences 48 (11-12), pp. 1153 - 1158 (1992)