1. P. A. Gunatillake and R. Adhikari, Eur. Cells Mater. 5, 1 (2003).
2. F. G. Thankam and J. Muthu, J. Biomed. Mater. Res. A 102, 2238 (2014).
3. S. van Vlierberghe, P. Dubruel, and E. Schacht, Biomacromolecules, No. 12, 1387 (2011).
4. M. K. Mitha and M. Jayabalan, J. Mater. Sci. Mater. Med., No. 20, 203 (2009).
5. L. M. Suta, G. Vlase, T. Vlase, et al., Rev. Chim. 67, 84 (2014).