9Sizing, Selection, and installation of pressure -relieving devices in Refineries. Part1 - sizing and selection. API standard 520 eighth edition, December 2008.
10J. O. FRANCIS and W. E. SHACKELTON, A Calculation of Relieving Requirements in the Critical Region, 1985 Proceed- ings-Refining Department, Volume 64 , American Petroleum In- stitute, pp. 179 - 182.