[1. Elmenhorst, H., and Sdmltz, C.: Beitr. Tabakforsch. 4 (1.968) 90.]Search in Google Scholar
[2. Juvet, R. 5., and Zadlo, F.: in "Advances in Chromatography", Vol. 1., J. C. Giddings and R. A. Keller, editors, Marcel Dekker, Inc., New York, :1965, pp. 26,5-27:1. ]Search in Google Scholar
[3. Mumpower, R. C., Lewis, J. S., and Touey, G. P.: Tob. Sci. 6 (:1962) :140. ]Search in Google Scholar
[4. Williams, T. B., and Belk, C. W.: 24th Tobacco Chemists' Researdt Conference, Montreal, Canada, Oct. 28, :1970]Search in Google Scholar
