B. M. Abbott. 1974. “A Discussion of New Results from Continuous Gasometric Determinations of Carbonate in Cuttings and Cores from Drill Holes, by Schettler, Vol. 52(2) P. 93-99”. Netherlands Journal of Geosciences, January, 123. https://njgjournal.nl/index.php/njg/article/view/14441.