Ebeling, W., Hennrich, N., Klockow, M., Metz, H., Orth, H.D. and Lang, H. (1974). „Proteinase K from Tritirachium album Limber”. Eur. J. Biochem.47: 91-97. PMID4373242.
Kraus, E., Klitz, H.H. and Fembert, U.F. (1976). „The specificity of proteinase K against oxidized insulin B chain”. Hoppe-Seyler's Z. Physiol. Chem.357: 233-237. PMID943367.
Betzel, C., Teplyakov, A.V., Harutyunyan, E.H., Saenger, W. and Wilson, K.S. (1990). „Thermitase and proteinase K: a comparison of the refined three-dimensional structures of the native enzymes”. Protein Engineering3: 161-172. PMID2184432.