Lopes-Marques M, Ruivo R, Fonseca E, Teixeira A, Castro LF (November 2017). "Unusual loss of chymosin in mammalian lineages parallels neo-natal immune transfer strategies". Molecular Phylogenetics and Evolution. 116: 78–86. doi:10.1016/j.ympev.2017.08.014. PMID28851538.
Kitamura N, Tanimoto A, Hondo E, Andrén A, Cottrell DF, Sasaki M, Yamada J (August 2001). "Immunohistochemical study of the ontogeny of prochymosin--and pepsinogen-producing cells in the abomasum of sheep". Anatomia, Histologia, Embryologia. 30 (4): 231–5. doi:10.1046/j.1439-0264.2001.00326.x. PMID11534329. S2CID7552821.
Henschel MJ, Newport MJ, Parmar V (1987). "Gastric proteases in the human infant". Biology of the Neonate. 52 (5): 268–72. doi:10.1159/000242719. PMID3118972.
Gilliland GL, Oliva MT, Dill J (1991). "Functional Implications of the Three-Dimensional Structure of Bovine Chymosin". Structure and Function of the Aspartic Proteinases. Advances in Experimental Medicine and Biology. Vol. 306. pp. 23–37. doi:10.1007/978-1-4684-6012-4_3. ISBN978-1-4684-6014-8. PMID1812710.
PDB: 4CMS; Newman M, Safro M, Frazao C, Khan G, Zdanov A, Tickle IJ, et al. (October 1991). "X-ray analyses of aspartic proteinases. IV. Structure and refinement at 2.2 A resolution of bovine chymosin". Journal of Molecular Biology. 221 (4): 1295–309. doi:10.1016/0022-2836(91)90934-X. PMID1942052.
Lopes-Marques M, Ruivo R, Fonseca E, Teixeira A, Castro LF (November 2017). "Unusual loss of chymosin in mammalian lineages parallels neo-natal immune transfer strategies". Molecular Phylogenetics and Evolution. 116: 78–86. doi:10.1016/j.ympev.2017.08.014. PMID28851538.
Kitamura N, Tanimoto A, Hondo E, Andrén A, Cottrell DF, Sasaki M, Yamada J (August 2001). "Immunohistochemical study of the ontogeny of prochymosin--and pepsinogen-producing cells in the abomasum of sheep". Anatomia, Histologia, Embryologia. 30 (4): 231–5. doi:10.1046/j.1439-0264.2001.00326.x. PMID11534329. S2CID7552821.
Henschel MJ, Newport MJ, Parmar V (1987). "Gastric proteases in the human infant". Biology of the Neonate. 52 (5): 268–72. doi:10.1159/000242719. PMID3118972.
Gilliland GL, Oliva MT, Dill J (1991). "Functional Implications of the Three-Dimensional Structure of Bovine Chymosin". Structure and Function of the Aspartic Proteinases. Advances in Experimental Medicine and Biology. Vol. 306. pp. 23–37. doi:10.1007/978-1-4684-6012-4_3. ISBN978-1-4684-6014-8. PMID1812710.
PDB: 4CMS; Newman M, Safro M, Frazao C, Khan G, Zdanov A, Tickle IJ, et al. (October 1991). "X-ray analyses of aspartic proteinases. IV. Structure and refinement at 2.2 A resolution of bovine chymosin". Journal of Molecular Biology. 221 (4): 1295–309. doi:10.1016/0022-2836(91)90934-X. PMID1942052.
PDB: 4CMS; Newman M, Safro M, Frazao C, Khan G, Zdanov A, Tickle IJ, et al. (October 1991). "X-ray analyses of aspartic proteinases. IV. Structure and refinement at 2.2 A resolution of bovine chymosin". Journal of Molecular Biology. 221 (4): 1295–309. doi:10.1016/0022-2836(91)90934-X. PMID1942052.
Kitamura N, Tanimoto A, Hondo E, Andrén A, Cottrell DF, Sasaki M, Yamada J (August 2001). "Immunohistochemical study of the ontogeny of prochymosin--and pepsinogen-producing cells in the abomasum of sheep". Anatomia, Histologia, Embryologia. 30 (4): 231–5. doi:10.1046/j.1439-0264.2001.00326.x. PMID11534329. S2CID7552821.