Wallraff, H. (2005). ‘Beyond familiar landmarks and integrated routes: goal-oriented navigation by birds’, Connection Science, 17 (1–2). P. 91–106.
347
Boström, J. E., Åkesson, S., & Alerstam, T. (2012). ‘Where on earth can animals use a geomagnetic bi-coordinate map for navigation?’, Ecography, 35 (11). P. 1039–1047.