1. Angelo, N., Aronson, A.:Physiology of sporulation mutants of Bacillus cereus T, producing low amounts of extracellular protease. Bacteriol. Proc. p. 29, 1967.
2. Bernlohr, R. W.:Postlogarithmic phase metabolism of sporulating microorganisms. I. Protease of Bacillus licheniformis. J. biol. Chem. 239: 538, 1964.
3. Bidwell, E.:Proteolytic enzymes of Clostridium welchii. Biochem. J. 46: 589, 1950.
4. Chaloupka, J.:Proteolytic enzymes of actinomycete Streptomyces griseus. II. The influence of the nature and concentration of nitrogen on the secretion of protease. Čs. Mikrobiol. 1: 32, 1956.
5. Chaloupka, J.:Regulation of formation of a proteinase from Bacillus megaterium. Symposium on Proteolytic Enzymes, Uppsala 1967.