[1. Goldring, L. S., J. V Fiore and A. C. Gadziala: X-ray study of cigarette structure; Beitr. Tabakforsch. 7 (1973) 121-137]Search in Google Scholar
[2. Brenizer, J. S., M. F. Sulcoski, R. W Jenkins, Jr., D. D. McRae and R. H. Newman: Observation of density variations in tobacco rods by neutron radiography; Beitr. Tabakforsch. Int. 14 (1987) 21-28.]Search in Google Scholar