?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=A.I.&rft.aulast=Wentzel&rft.au=Wentzel%2C+A.I.&rft.title=Ethnic+diversity+in+social+networks+and+the+success+of+self-employed+migrants.&rft.date=2019&rft.degree=Master