1. Antibacterial activity in vitro of fucidin;Barber;Lancet,1962
2. Isolation of antibiotics from a species of Cephalosporium. Cephalosporins P1, P2, P3, P4, and P5;Burton;Biochem. J.,1951
3. Cephalosporin P1 and helvolic acid;Burton;Biochem. J.,1956
4. Fucidins (ZN 6) antibakterielle effekt in vitro;Bülow-Sørensen;Ugeskr. Laeg.,1962
5. Helvolic acid, an antibiotic produced by Aspergillus fumigatus, mut. helvola;Chain;Yuill Brit. J. exp. Path.,1943