Tob. Reporter, 1986, 113-10, p. 64, ISSN.0361-5693 Cigarette filter with spaced peripheral channels SEIDEL H.; WILDENAU W.; MANTKE J. US Patent 4,593,707. Reemtsma. Variable dilution filter. Authors SEIDEL H. WILDENAU W. MANTKE J. Sources Tobacco Reporter Publication year 1986 Type Publication