3Covington AD. Lampard GS. Studies on the origin of hydrothermal stability, a new theory of tanning[J]. JALCA,1998,93:110.
4Hernandez Juan F, Kallenherger Waldo E. Combination tannages with vegetable tanning and aluminium[J]. JALCA, 1984,79 : 182--206.
5Hernandez JF. Comhination Tannages with Vegetahle Tannins, Aluminum, and Other Suhstancesv[J]. JSLTC, 1983,86(4) :186.
6Gustavson KH. The effect of esterification of the carboxyl groups of cOSlagen upon its combination with chromium compounds[J] . J ALCA, 1952,74 : 4608-- 4611.
7Sykes RL. Studies on the reactive groups of collagen Part Ⅲ-Cross-linkage and its relation to tanning[J]. JSLTC,1956,40:71 --76.
8Sykes R L. Chromium fixation on acetylated collagen[J] . JSLTC, 1955,39.56--58.
9Sykes R J. Modification of some reactive groups of collagen and the effect on the fixation of tervalent chromium salts[J]. JALCA, 1956,51:235--244.
