@article{portes_immigration_1997,
	title = {Immigration theory for a new century: Some problems and opportunities},
	author = {Alejandro Portes},
	journal = {International Migration Review},
	pages = {799–825},
	volume = {31},
	year = {1997},
	biburl = {http://www.bibsonomy.org/bibtex/2a53b5eb9530198a7b3ce26b3082e9407/snauth},
	keywords = {imported }
}