@article {Petrakis-2014,
	title = {The construction of opportunity entrepreneurship function},
	journal = {International Entrepreneurship and Management Journal},
	volume = {10},
	number = {2},
	year = {2012},
	pages = {207-230},
	doi = {10.1007/s11365-012-0241-4},
	author = {Petrakis, P}
}
