Niskanen, Raina, and Väinö Mäntylahti. “Determination of Soil Specific Surface Area by Water Vapor Adsorption: I Drying of Soil Samples”. Agricultural and Food Science 59, no. 2 (April 1, 1987): 63–65. Accessed May 19, 2024. https://journal.fi/afs/article/view/72248.