Al-Zahrani, 1996, Psychopharmacology (Berl), 127, 346???352
Araneda, 1991, Neuroscience, 40, 399???412, 10.1016/0306-4522(91)90128-B
Barnes, 1999, Neuropharmacology, 38, 1083???1152, 10.1016/S0028-3908(99)00010-6
Baxter, 1995, Trends Pharmacol Sci, 112, 323???331
Bizo, 1994a, J Exp Psychol Anim Behav Process, 20, 308???321, 10.1037/0097-7403.20.3.308
Bizo, 1994b, J Exp Anal Behav, 61, 19???33, 10.1901/jeab.1994.61-19
Blue, 1988, Brain Res, 453, 315???328, 10.1016/0006-8993(88)90172-2
Body, 2001, Psychopharmacology (Berl), 158, 305???313
Body, 2002a, Pharmacol Biochem Behav, 71, 787???793, 10.1016/S0091-3057(01)00674-8
Body, 2002b, Behav Pharmacol, 13, 603???514, 10.1097/00008877-200212000-00001
Catania, 1968, J Exp Anal Behav, 11, 327???383, 10.1901/jeab.1968.11-s327
Chiang, 1998, Behav Proc, 44, 197???209, 10.1016/S0376-6357(98)00049-7
Chiang, 1999, Psychopharmacology (Berl), 143, 166???173, 10.1007/s002130050932
Chiang, 2000a, Psychopharmacology (Berl), 150, 170???184, 10.1007/s002130000422
Chiang, 2000b, Psychopharmacology (Berl), 151, 379???391, 10.1007/s002130000495
Evenden, 1999, Psychopharmacology (Berl), 146, 422???431
Gibbon, 1997, Curr Opin Neurobiol, 7, 170???184, 10.1016/S0959-4388(97)80005-0
Ho, 1998, J Psychopharmacol, 12, 68???78, 10.1177/026988119801200109
Ho, 2002, Pharmacol Biochem Behav, 71, 773???785, 10.1016/S0091-3057(01)00672-4
Hoyer, 2002, Pharmacol Biochem Behav, 71, 533???554, 10.1016/S0091-3057(01)00746-8
Hsieh, 1998, Pharmacol Biochem Behav, 60, 337???343, 10.1016/S0091-3057(97)00591-1
Killeen, 1988, Psychol Rev, 95, 274???295, 10.1037/0033-295X.95.2.274
Lucas, 2001, Eur J Neurosci, 13, 889???898, 10.1046/j.0953-816x.2000.01453.x
Machado, 2000, J Exp Anal Behav, 74, 25???54, 10.1901/jeab.2000.74-25
Marek, 1989, J Pharmacol Exp Ther, 250, 60???71
Meck, 1996, Cognit Brain Res, 3, 227???242, 10.1016/0926-6410(96)00009-2
Odum, 2002, J Exp Anal Behav, 78, 195???214, 10.1901/jeab.2002.78-195
Pompeiano, 1992, J Neurosci, 12, 440???453, 10.1523/JNEUROSCI.12-02-00440.1992
Shankar, 2000, Indian J Physiol Pharmacol, 44, 355???358
Stubbs, 1976, J Exp Anal Behav, 26, 15???25, 10.1901/jeab.1976.26-15
Stubbs, 1980, J Exp Anal Behav, 33, 167???185, 10.1901/jeab.1980.33-167