1. Burger MM (1970) Nature227, 170?171.
2. Pohjapelto P (1977) J. Cell. Physiol.91, 387?392.
3. Cunningham DD & Ho TS (1975) inProteases and Biological Control (Reich E, Rifkin DB & Shaw E, eds), pp 795?806, Cold Spring Harbor.
4. Glenn KC & Cunningham DD (1979) Nature278, 711?714.
5. Quigley JP, Martin BM, Goldfarb RH, Scheiner, CJ & Miller WD (1979)Cold Spring Harbor Conferences on Cell Proliferation 6, 219?238.