[1. Grob, K., Beiträge zur Tabakforschung, Heft 7, 285, 1962.]Search in Google Scholar
[2. Bentley, H. R., Berry, E. G. N., Tob. Manuf. Standing Committee, Research Paper No. 3, 1959, First Supplement 1960. ]Search in Google Scholar
[3. Kuhn, H., Pailer, M., Grünberger, I., Fachliche Mitteilungen der Österreichischen Tabakregie, Heft 3, 1, 1962 ]Search in Google Scholar
[4. Irby, R. M., Harlow, E. 5., Tobacco Science, 3, 52, 1959. ]Search in Google Scholar
[5. Walsh, I. T., Analytical Chemistry, 32, 1379, 1960.10.1021/ac60167a001]Search in Google Scholar
[6. West, P. W. et al., J, Chromatography, 6, 220,1961. 10.1016/S0021-9673(61)80247-1]Search in Google Scholar
[7. Habboush, A. E. et al., J. Chromatography, 7, 438, 1962.10.1016/S0021-9673(01)86451-7]Search in Google Scholar
[8. Williamson, J. T., persönliche Mitteilung, 1961.]Search in Google Scholar