?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Enthoven%2C+M.P.M.&rft.aufirst=M.P.M.&rft.aulast=Enthoven&rft.date=2016&rft.degree=Master&rft.title=Sustainable+entrepreneurship%3A+Values%2C+social+networks+and+spatial+concentration