@book{180322,
	author = {Borland, R. and et al.},
	title = {Trends in beliefs about the harmfulness and use of stop smoking medications and smokeless tobacco products among cigarettes smokers: findings from the ITC four country survey},
	url = {\\Srvdatos\siis\docus\Revistas electrónicas\Harm Reduction Journal R.1830\2011\Trends in beliefs about the harmfulness.pdf}
}