Authors: L J Old; E A Boyse; H F Oettgen; E D Harven; G Geering; B Williamson; P Clifford Journal: Proc Natl Acad Sci U S A Date: 1966-12 Impact factor: 11.205
Authors: P S Papageorgiou; C F Sorokin; K Kouzoutzakoglou; R J Bonforte; P L Workman; P R Glade Journal: Infect Immun Date: 1973-04 Impact factor: 3.441