1. 1947 Eisenhart, L. P.: Differential Geometry, Princeton University Press, Princeton, N. J.
2. 1952 Truesdell, C. A.: The mechanical foundations of elasticity and fluid dynamics. J. Rational Mech. Anal. 1, 125–300.
3. 1954 Sckouten, J. A.: Tensor Analysis for Physicists. Oxford University Press, Oxford.
4. 1955 1. Caprioli, L.: Su una criteria per l'esistenza dell'energia di deformazione. Boll. Un. Mat. Ital. (3) 10, 481–483.
5. 1955 2. Noll, W.: On the continuity of the solid and fluid states. J. Rational Mech. Anal. 4, 3–81.