1. Chemistry of antibiotics of clinical importance;Regna;Am. J. Med.,1955
2. Stable penicillins;Brandl;Oesterr. Chem. Zeit.,1954
3. Some novel acid-stable penicillins;Doyle;Nature,1961
4. The cephalosporins;Abraham;Pharmacol. Rev.,1962
5. Identity of cephalosporin B and synnematin B;Abraham;Nature,1955