Dall’Aglio, C., Pascucci, L., Mercati, F., Giontella, A., Pedini, V., Scocco, P. and Ceccarelli, P. (2009) “Identification of orexin A- and orexin type 2 receptor-positive cells in the gastrointestinal tract of neonatal dogs”, European Journal of Histochemistry, 52(4), pp. 229–236. doi: 10.4081/1221.