@article{Sahlstr�m2001,
	title = {Impact of stock option listings on return and risk characteristics in Finland},
	author = {Petri Sahlstr{\"o}m},
	journal = {International Review of Financial Analysis},
	month = {00},
	number = {1},
	pages = {19--36},
	url = {http://www.sciencedirect.com/science/article/B6W4W-42M76RT-2/1/f31eb8416d002a5199c68f2b650a23cb},
	volume = {10},
	year = {2001},
	biburl = {http://www.bibsonomy.org/bibtex/20f006af8204b4f973c4e72750a9ae429/smicha},
	keywords = {Volatility }
}