1. Able, K. P. (1996). Large-scale navigation. The Journal of Exp. Biology, 199, 1–2.
2. Allen, G.L. (1999). Spatial abilities, cognitive maps, and wayfinding: Bases for individual differences in spatial cognition and behavior. In R. Golledge (ed.), Wayfinding behavior (46–80). Baltimore: Johns Hopkins.
3. Berendt, B., Barkowsky, T., Freksa, C., & Kelter, S. (1998). Spatial representation with aspect maps. In C. Freksa, C. Habel, & K. F. Wender (Eds.), Spatial cognition-An interdisciplinary approach to representing and processing spatial knowledge. Barlin: Springer.
4. Cartwright, B.A. & Collet, T.S. (1983). Landmark Learning in Bees. In Journal of Comparative Physiology, A 151, 521–543.
5. Collet, T.S. & Baron, J. (1994). Biological compasses and the coordinate frame of landmark memories in honeybees. Nature, 368, 137–140.