?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Boehmer%2C+CG&rft.aulast=Boehmer&rft.aufirst=CG&rft.date=2+June+2015&rft.issn=1550-2368&rft.atitle=Interacting+quintessence+from+a+variational+approach.+I.+Algebraic+couplings&rft.title=Physical+Review+D&rft.volume=91&rft.genre=article