?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=+Trpkova+Marija&rft.aufirst=Marija&rft.aulast=Trpkova&rft.date=2010&rft.isbn=978-963-06-9558-9&rft.title=Twostep+cluster+analysis+%3A+segmentation+of+largest+companies+in+Macedonia&rft.genre=proceeding