[1. U.S. Food and Drug Administration: Nicotine in cigarettes and smokeless tobacco products is a drug and these products are nicotine delivery devices under the federal food, drug, and cosmetic act; Federal Register, 21 CFR Part 801, 60 (1995) 41454–41787.]Search in Google Scholar
[2. Grunberg, N.E., D.E. Morse, V.A. Maycock, and L.T. Kozlowski: Changes in overwrap and butt length of American filter cigarettes: An influence on reported tar yields; NY State Journal of Medicine, July 1985, 310–312.]Search in Google Scholar
[3. Wilkenfeld, J., J. Henningfield, J. Slade, D. Burns, and J. Pinney: It's time for a change: Cigarette smokers deserve meaningful information about their cigarettes; J. Natl. Cancer Inst. 92 (2000) 90-91.]Search in Google Scholar
[4. Henningfield, J.E., L.T. Kozlowski, and N.L. Beno-witz: A proposal to develop meaningful labeling for cigarettes, JAMA 272 (1994) 312–314.]Search in Google Scholar
[5. Schulz, W. and F. Seehofer: Über die Länge von Cigarettenstummeln in der Bundesrepublik Deutsch-land im Jahre 1968 [Examination of the cigarette butt length in 1968 in the Federal Republic of Germany]; Beitr. Tabakforsch. 5 (1970) 198–200.]Search in Google Scholar
[6. Schulz, W.: Die Auswirkung der Tabaksteuererhöhung vom 1.9.1972 auf die Länge der Cigarettenstummel in der Bundesrepublik Deutschland [The influence of the tobacco tax increase of September 1st, 1972, in the Federal Republic of Germany on the butt lengths left by smokers]; Beitr. Tabakforsch. 7 (1974) 203–205.]Search in Google Scholar
[7. Schulz, W. and F. Seehofer: Die Auswirkung der wirtschaftlichen Rezession auf die Länge der Cigar-ettenstummel in der Bundesrepublik Deutschland [The effect of the economic depression on the length of cigarette butts in the Federal Republic of Germany]; Beitr. Tabakforsch. 8 (1976) 455–458.]Search in Google Scholar
[8. Schulz, W.: Die Auswirkung der Tabaksteuererhöhung vom 1. Juni 1982 auf die Länge der Cigarettenstummel in der Bundesrepublik Deutschland [The effect of the increase of tobacco tax on 1st of June 1982 on the length of cigarette butts in the Federal Republic of Germany]; Beitr. Tabakforsch. Int. 13 (1986) 215–218.]Search in Google Scholar
[9. Schulz, W. and F. Seehofer: Smoking behavior in Germany – The analysis of cigarette butts (KIPA), in: Smoking behavior, edited by R.E. Thornton, Churchill Livingstone, London, 1978, 259–276.]Search in Google Scholar
[10. Rawbone, R.G., K. Murphy, M.E. Tate, and S.J. Kane: The analysis of smoking parameter, inhalation and absorption of tobacco smoke in studies of human smoking behavior; in: Smoking behavior, edited by R. E. Thornton, Churchill Livingstone, London, 1978, 171–194.]Search in Google Scholar
[11. Creighton, D.E. and P.H. Lewis: The effect of different cigarettes on human smoking patterns; in: Smoking behavior, edited by R. E. Thornton, Churchill Living-stone, London, 1978, 289–300.]Search in Google Scholar
[12. Adams, P.I.: The influence of cigarette smoke yields on smoking habits; in: Smoking behavior, edited by R.E. Thornton, Churchill Livingstone, London, 1978, 349–360.]Search in Google Scholar
[13. Djordjevic, M.V., D. Hoffmann, S. Thompson, and S.D. Stellman: Smoking behavior and exposure to select toxic agents among smokers of low and medium yield cigarettes; in: CORESTA Proceedings: Smoke and Technology Group, Brighton, England 11–15 October 1998, pp. 186–193.]Search in Google Scholar
[14. Porter, A. and P. Dunn: Mouth insertion depths in Cana-dian smokers; Beitr. Tabakforsch. Int. 18 (1998) 85–91.]Search in Google Scholar
[15. Schroder, R.: Progress Report April-Juni 1973, Bates No. 650036200-650036255 and Progress Report, Juli-September 1973, Bates No. 650036256-650036336, http://www.bwdocs.com/.]Search in Google Scholar