Gerd Kaupp (2022) “Investigation on Six Polymorphs of Sodium Chloride upon Depth-Sensing Macroindentation with Unusual Long-Range Cracks Requiring 30 N Load”, Basic Mathematics for Physically Correct Mechanical Properties from Indentations, pp. 64–86. doi: 10.9734/bpi/mono/978-93-5547-921-1/CH6.