1. Chiantore O, Lazzari M,Int. J. Polym. Analysis & Characterization,2, 395, 1996.
2. Botteghi C, Matteoli U, Paganelli S, Arbizzani R, Ciardelli F, Aglietto M, Taburoni E, and Fassina V,Sci. & Technol. Cultural Heritage,1, 111, 1992.
3. Ciardelli F, Aglietto M, Passaglia E, Montagnini di Mirabello L, and Ruggeri G,Paints and Varnishes,72 (3), 21, 1996.
4. Brady R F,Chemistry in Britain, 427, 1990;
5. Zhang Y-X, Da A-H, Butler GB, and Hogen-Esch TE,J. Polym. Sci., Part A: Polym. Chem.,30, 1383, 1992.