1. Parapepsins: two proteolytic enzymes associated with porcine pepsin;Ryle, A.P.; Porter, R.R.;Biochem. J,1959
2. Pepsinogen B: the zymogen of pepsin B;Ibid
3. Activity and specificity of rennin;Fish, J.C.;Nature (Lond.),1957
4. Properties of rennin;Friedman, L.;Diss. Abstr,1960
5. A review on prorennin and;Foltmann, B.;Carlsberg; Chromatographic isolation of gastricsin, the proteolytic, enzyme from gastric juice with pH optimum 32,1966