@booklet {Petrakis-2004,
	title = {Entrepreneurship and risk premium},
	journal = {Small Business Economics},
	volume = {23},
	number = {2},
	year = {2004},
	pages = {85-98},
	doi = {10.1023/B:SBEJ.0000027563.66389.4c},
	author = {Petrakis, P}
}
