?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=K+K&rft.au=Sharma%2C+K+K&rft.aulast=Sharma&rft.atitle=Factors+affecting+high+frequency+differentiation+of+shoots+and+roots+from+cotyledon+explants+of+Brassica+juncea+(L.)+czern&rft.title=Plant+Science&rft.issn=0168-9452&rft.date=1990&rft.volume=66&rft.pages=247-253&rft.issue=2&rft.genre=article