1. Corradetti R, et al. J Pharmacol Exp Ther. 1996, 278(2), 679-688.
2. Fletcher A, et al. Behav Brain Res. 1996, 73(1-2), 337-353.
3. Hall H, et al. Brain Res. 1997, 745(1-2), 96-108.
4. Forster EA, et al. Eur J Pharmacol. 1995, 281(1), 81-88.
5. Laporte AM, et al. Eur J Pharmacol. 1994, 271(2-3), 505-514.