@article {9658,
	title = {Conditioned drug reward enhances subsequent spatial learning and memory in rats},
	journal = {Psychopharmacology},
	year = {2007},
	pages = {193-201},
	doi = {10.1007/s00213-007-0893-x},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/17661018},
	author = {Hai-Feng Zhai and Zhang-Yin Zhang and Mei Zhao and Yi Qiu and Udi E. Ghitza and Lin Lu}
}
