Authors: A M Berry; O T Harriott; R A Moreau; S F Osman; D R Benson; A D Jones Journal: Proc Natl Acad Sci U S A Date: 1993-07-01 Impact factor: 11.205
Authors: H P Spaink; D M Sheeley; A A van Brussel; J Glushka; W S York; T Tak; O Geiger; E P Kennedy; V N Reinhold; B J Lugtenberg Journal: Nature Date: 1991-11-14 Impact factor: 49.962