As noted in Esther M. Zimmer Lederberg's handwritten notes about 
  Colicins E5, E6 and E7 below, Dr. Bonnie M. Males published two papers 
  on Colicins with Bruce A. D. Stocker:
   
 
  
    
  Males BM, Stocker BA., J Bacteriol. 1980 Nov;144(2):524-31.
   
      
  Males BM, Stocker BA., J Gen Microbiol. 1982 Jan;128(1):95-106
 
   
 
   
  For Dr. Males' letter to the Stanford Report memorializing Esther M. 
  Zimmer Lederberg, see:
   
 
      
  http://www.esthermlederberg.com/EImages/Obituary/Bonnie_Males.html