Desmazeaud MJ (1974). "[General properties and specificity of action of a neutral intracellular endopeptidase from Streptococcus thermophilus]". Biochimie. 56 (9): 1173–1181. doi:10.1016/s0300-9084(74)80008-8. PMID4451671.
Smith RA, Green J, Kopper PH (July 1980). "The purification and properties of a fibrinolytic neutral metalloendopeptidase from Streptococcus faecalis". Archives of Biochemistry and Biophysics. 202 (2): 629–638. doi:10.1016/0003-9861(80)90471-3. PMID6779709.
Desmazeaud MJ (1974). "[General properties and specificity of action of a neutral intracellular endopeptidase from Streptococcus thermophilus]". Biochimie. 56 (9): 1173–1181. doi:10.1016/s0300-9084(74)80008-8. PMID4451671.
Smith RA, Green J, Kopper PH (July 1980). "The purification and properties of a fibrinolytic neutral metalloendopeptidase from Streptococcus faecalis". Archives of Biochemistry and Biophysics. 202 (2): 629–638. doi:10.1016/0003-9861(80)90471-3. PMID6779709.