Duell, Anna K Boiling points of the propylene glycol + glycerol system at 1 atmosphere pressure: 188.6-292 °C without and with added water or nicotine. [electronic resource] - Chemical engineering communications 2018 - 1691-1700 p. digital Publication Type: Journal Article ISSN: 0098-6445 Standard No.: 10.1080/00986445.2018.1468758 doi