TY - JOUR AU - Clerc, D AU - Ledbetter, H C2 - Journal of Physics and Chemistry of Solids DA - 1998-08-01 LA - en M1 - 59 PB - Journal of Physics and Chemistry of Solids PY - 1998 TI - Mechanical hardness: A Semiempirical Theory Based on Screened Electrostatics and Elastic Shear ER -