?url_ver=Z39.88-2004&rft_id=10.1007%2Fs10681-017-2034-x&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=L+O&rft.au=Omoigui%2C+L+O&rft.aulast=Omoigui&rft.atitle=Performance+of+cowpea+varieties+under+Striga+gesnerioides+(Willd.)+Vatke+infestation+using+biplot+analysis&rft.title=Euphytica&rft.issn=0014-2336&rft.date=10+October+2017&rft.volume=213&rft.pages=1-16&rft.issue=244&rft.genre=article