1. Brinell, J.A., ‘Congrès International des Méthodes d’Essai des Matériaux de Construction’, Paris, Tome 2, 83–94 1901.
2. Tabor, D., ‘The Hardness of Metals’ (Oxford classical texts in the physical sciences—First published 1951, 2000).
3. Boussinesq, J., ‘Applications des potentiels à l’étude de l’équilibre et du mouvement des solides élastiques’, (Gauthier-Villars, 1885).
4. Hertz, H., ‘On the contact of elastic solids (in German), Zeitschrift für die Reine und angewandte Mathematik’, English translation in miscellaneous papers (translated by D.E. Jones and G.A. Schott) (1881)99 146–62. Macmillan, London, UK, (1986)92 156–71.
5. Sneddon, I., ‘The relation between load and penetration in the axisymmetric Boussinesq problem for a punch of arbitrary profile’,International Journal of Engineering Science 3 (1965) 47.