^Amagase, S., Nakayama, S. and Tsugita, A. (1969). „Acid protease inNepenthes. II. Study on the specificty of nepenthesin”.J. Biochem. (Tokyo).66: 431—439.PMID5354017.CS1 одржавање: Вишеструка имена: списак аутора (веза)
^Garg, G.K. & Virupaksha, T.K. (1970). „Acid protease from germinated sorghum. 2. Substrate specificity with synthetic peptides and ribonuclease A”.Eur. J. Biochem.17: 4—12.PMID5486576.
^Shinano, S. & Fukushima, K. (1971). „Studies on lotus seed protease. Part III. Some physicochemical and enzymic properties”.Agric. Biol. Chem.35: 1488—1494.
^Amagase, S. (1972). „Digestive enzymes in insectivorous plants. III. Acid proteases in the genusNepenthes andDrosera peltata”.J. Biochem. (Tokyo).72: 73—81.PMID5069751.
^Takahashi, K., Chang, W-J. and Ko, J-S. (1974). „Specific inhibition of acid proteases from brain, kidney, skeletal muscle, and insectivorous plants by diazoacetyl-DL-norleucine methyl ester and by pepstatin”.J. Biochem. (Tokyo).76: 897—899.PMID4436292.CS1 одржавање: Вишеструка имена: списак аутора (веза)
