@article {9633,
	title = {Effect of environmental stressors on opiate and psychostimulant reinforcement, reinstatement and discrimination in rats: A review},
	journal = {Neuroscience and Biobehavioral Reviews},
	year = {2003},
	pages = {457-491},
	doi = {10.1016/S0149-7634(03)00073-3},
	url = {http://www.ncbi.nlm.nih.gov/pubmed/14505687},
	author = {Lin Lu and Jack D. Shepard and F. Scott Hall and Yavin Shaham}
}
