Vapor pressure measurements of tobacco pyrolysis tar by a non-isothermal Knudsen effusion methodShim, Hong-Shing; Oja, Vahur; Hajaligol, MohammadJournal of analytical and applied pyrolysis2003 / p. 183-190 : ill https://www.sciencedirect.com/science/article/abs/pii/S0165237002001134