S. A. S.  Alariqi, A. Kumar, P., Rao, B. S. M., Tevtia, A. K., and Singh, R. P., ?Stabilization of gamma-sterilized biomedical polyolefins by synergistic mixtures of oligomeric stabilizers?, Polymer Degradation and Stability, vol. 91, no. 10, pp. 2451-2464, 2006.

R.  K. Reddy, Kumar, B., Rana, S., Tevtia, A. K., and Singh, R. P., ?Synthesis and characterization of hindered amine light stabilizers based on end functionalization of polypropylene?, Journal of Applied Polymer Science, vol. 104, no. 3, pp. 1596-1602, 2007.