?url_ver=Z39.88-2004&rft_id=doi%3A10.1016%2Fj.proeng.2017.09.399&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Lepidi%2C+Marco&rft.aulast=Lepidi&rft.aufirst=Marco&rft.issn=1877-7058&rft.pages=1460-1465&rft.volume=199&rft.date=2017&rft.atitle=Asymptotic+approximation+of+the+band+structure+for+tetrachiral+metamaterials&rft.title=Procedia+Engineering&rft.genre=article