1. Barret, A. J.: Purification and properties of cathepsin D from liver of the chicken, rabbit and man. In: Tissue Proteinases, p. 109. Amsterdam-London: North-Holland Publishing Co. 1971.
2. Raven, H. M.: Biochemische Taschenbuch. Vol. II, p. 93. Berlin-Göttingen-Heidelberg: Springer 1964.
3. Fräki, J. E., Hopsu-Havu, V. K.: Vascular permeability increasing factors (high molecular weight) of human skin. Scand. J. clin. Lab. Invest.27, Suppl. 116, 3 (1971).
4. ?, ?: Human skin proteases. Differential extraction of proteases and of endogenous protease inhibitors. Arch. Derm. Forsch.242, 329 (1972)
5. ?, Jansén, C. T., Hopsu-Havu, V. K.: Human sweat kallikrein. Biochemical demonstration and chromatographic separation from several other esteropeptidases in the sweat. Acta derm.-venereol. (Stockh.)50, 321 (1970).