1. Calleja-Agius, J., Muscat, B. Y., & Brincat, M. P. (2007). Skin ageing. Menopause International, 13, 60–64. doi: 10.1258/175404507780796325 .
2. Olsen, D., Yang, C. L., Bodo, M., Chang, R., Leigh, S., Baez, J., et al. (2003). Recombinant collagen and gelatin for drug delivery. Advanced Drug Delivery Reviews, 55, 1547–1567. doi: 10.1016/j.addr.2003.08.008 .
3. Fan, D. D., Duan, M. R., Mi, Y., Song, J. R., Xi, J. F., Wang, D. W., et al. (2002). High density fermentation of recombinant E. coli for production of human-like collagen. Journal of Chemical Industry and Engineering (China), 53, 752–754.
4. Fan, D. D., Luo, Y. E., Mi, Y., Ma, X. X., & Shang, L. A. (2005). Characteristics of fed-batch cultures of recombinant Escherichia coli containing human-like collagen cDNA at different specific growth rates. Biotechnology Letters, 27, 865–870. doi: 10.1007/s10529-005-6720-8 .
5. Luo, Y. E., Fan, D. D., Ma, X. X., Wang, D. W., Mi, Y., Hua, X. F., et al. (2005). Process control for production of human-like collagen in fed-batch culture of Escherichia coli BL 21. Chinese Journal of Chemical Engineering, 13, 276–279.