References
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- The Chemistry and Technology of Leather, Volume II - Types of Tannages, P. O'Flaherty, W. T. Roddy, R. M. Lollar. Reinhold Publishing Corporation, New York 1958; 66–97; 221–321
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- Mellon E. F. The Chemistry and Technology of Leather, Volume II, F. O'Flaherty, W. T. Roddy, R. M. Lollar. Reinhold Publishing Corp., New York 1958; 67
- Thorstensen E. B. ibid. 251
- Thorstensen T. C. ibid. 233
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- Baker R. W., Lonsdale H. K. Controlled Release of Biologically Active Agents, A. C. Tanquary, R. E. Lacey. Plenum Press, New York 1974; 50