1. Elastic materials with couple-stresses;Toupin;Archive for Rational Mechanics and Analysis,1962
2. Effects of couple-stresses in linear elasticity;Mindlin;Archive for Rational Mechanics and Analysis,1962
3. Couple stresses in the theory of elasticity, I and II;Koiter;Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen. Series B. Physical Sciences,1964
4. Micro-structure in linear elasticity;Mindlin;Archive for Rational Mechanics and Analysis,1964