[1.. Mills, P. A., Onley, J. H., and Gaither, R. A.: J. of AOAC 46 (1.96:;) 1.86.]Search in Google Scholar
[2. Nelson, R. C.: ibid. 47 (1.964) 289. 10.1093/jaoac/47.2.289]Search in Google Scholar
[3. Nelson, R. C.: ibid. 48 (1.965) 752. 10.1093/jaoac/48.4.752]Search in Google Scholar
[4. Nelson, R. C.: ibid. 49 (1.966) 76:;. ]Search in Google Scholar
[5. Nelson, R. C.: ibid. 50 (1.967) 922.10.1093/jaoac/50.4.922]Search in Google Scholar
[6. Benson, W. R., Finocchario; J. M.: ibid. 48 (1.965} 676. 10.1093/jaoac/48.3.676]Search in Google Scholar
[7 Benson, W. R., Finocchario, J. M.: ibid. 48 (1.965)]Search in Google Scholar
[8. Bowery, T. G., Guthrie, F. E.: J. Agr. Food Chem. ' 9 (1.961.) 1.93· ]Search in Google Scholar
[9. Nesemann, E., Schroder, R., und SeehOfer, F.: Beitr. Tabakforsch. 4 (1.968} 1.97·]Search in Google Scholar
[10. Ives, N. F., and Giuffrida, L.: J. of AOAC 50 (1.967) 1..10.1093/jaoac/50.1.1]Search in Google Scholar
[11. Henly, R. 5., Croppa, R. F., and Suppina, W. R.: J. Agr. Food Chem. 1.4 (1.966) 667]Search in Google Scholar