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de Haën C, Neurath H, Teller DC (1975). “The phylogeny of trypsin-related serine proteases and their zymogens. New methods for the investigation of distant evolutionary relationships”. J. Mol. Biol.92 (2): 225–59. doi:10.1016/0022-2836(75)90225-9. PMID1142424.
Lesk AM, Fordham WD (1996). “Conservation and variability in the structures of serine proteinases of the chymotrypsin family”. J. Mol. Biol.258 (3): 501–37. doi:10.1006/jmbi.1996.0264. PMID8642605.
Gorbalenya AE, Blinov VM, Donchenko AP (1986). “Poliovirus-encoded proteinase 3C: a possible evolutionary link between cellular serine and cysteine proteinase families”. FEBS Lett.194 (2): 253–7. doi:10.1016/0014-5793(86)80095-3. PMID3000829.
Phan J, Zdanov A, Evdokimov AG, Tropea JE, Peters HK, Kapust RB, Li M, Wlodawer A, Waugh DS (2002). “Structural basis for the substrate specificity of tobacco etch virus protease”. J. Biol. Chem.277 (52): 50564–72. doi:10.1074/jbc.M207224200. PMID12377789.
Schutz CN, Warshel A (2004). “The low barrier hydrogen bond (LBHB) proposal revisited: the case of the Asp... His pair in serine proteases”. Proteins55 (3): 711–23. doi:10.1002/prot.20096. PMID15103633.