1. M.D. Lelah, S.L. Cooper, Polyurethanes in Medicine (CRC Press, Boca Raton, FL, 1984)
2. H. Planck, I. Syre, M. Danner, G. Egberg (eds.), Polyurethanes in Biomedical Engineering II. Progress in Biomedical Engineering (Elsevier, Amsterdam, 1987)
3. M. Jayabalan, N. Shunmughakumar, K. Ratinum, T.V. Kumari, J. Biomed. Mater. Res. 25, 1431 (1991)
4. M. Jayabalan, K. Rathinum, Clin. Mater. 11, 179 (1992)
5. N. Shunmughakumar, M. Jayabalan, Artif. Organs 16, 256 (1992)