?url_ver=Z39.88-2004&rft_id=10.1007%2Fs13205-014-0241-x&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Gopalakrishnan%2C+S&rft.aufirst=S&rft.aulast=Gopalakrishnan&rft.issn=2190-5738&rft.pages=355-377&rft.atitle=Plant+growth+promoting+rhizobia%3A+challenges+and+opportunities&rft.volume=5&rft.issue=4&rft.title=3+Biotech&rft.date=August+2015&rft.genre=article