Authors: F R Blattner; B G Williams; A E Blechl; K Denniston-Thompson; H E Faber; L Furlong; D J Grunwald; D O Kiefer; D D Moore; J W Schumm; E L Sheldon; O Smithies Journal: Science Date: 1977-04-08 Impact factor: 47.728
Authors: P J Greene; H L Heyneker; F Bolivar; R L Rodriguez; M C Betlach; A A Covarrubias; K Backman; D J Russel; R Tait; H W Boyer Journal: Nucleic Acids Res Date: 1978-07 Impact factor: 16.971