1. W.R. Harlan, J.M. Moseley, Kirk.-Othmer Encyclopedia of Chemical Technology, Wiley, New York, 1955
2. J.T. Diffee, Tobacco analysis by NIR spectroscopy, in: D.A. Burns, E.W. Ciurczak (Eds.), Handbook of Near-Infrared Analysis, Marcel Dekker, New York, 1992
3. F.D. Chattaway, G.D. Parbes, J. Chem. Soc. (1929) 2817