1. S.Y. Lin and K.P. Kringstad, Tappi, 53, 658 (1970).
2. J. Gierer and S.Y. Lin, Svensk Papperstidn., 75, 233 (1972).
3. E. Adler, Wood Sci. Technol., 11, 169 (1977).
4. J.K.S. Wan, I.A. Shkrob, and M.C. Depew,Photochemistry of Lignocellulose Materials, (Eds.) C. Heitner and J.C. Scaiano, ACS Symposium book, in press, 1993.
5. I.A. Shkrob, M.C. Depew, and J.K.S. Wan, Res. Chem. Intermed., 17, 271 (1992).