1. J.G. Prichard, Polyvinyl Alcohol, Basic Properties and Uses, Gordon and Breach, London (1970)
2. H. Matsuda and K. Yamano, J.Chem.Soc.Jpn. 73, 390 (1970)
3. P. Metzger Cotts and A.C. Ouano, Polym.Prepr. ACS, 23, 35 (1982)
4. V.Ye. Eskin and O.E. Korotkina, Vysokomol.Soedin. A12, 2216 (1970)
5. B.J.R. Scholtens and B.H. Bijsterbosch, J.Polym.Sci., Polym.Phys.Ed. 17, 1771 (1979)