[1] Del Piero, G. and Deseri, L.: Monotonic, completely monotonic, and exponential relaxation functions in linear viscoelasticity. Q. Appl. Math., 53, 273-300 (1995).
2.
[2] Del Piero, G. and Deseri, L.: On the concepts of state and free energy in linear viscoelasticity. Arch. Ration. Mech. Anal., 138, 1-35 (1997).
3.
[3] Del Piero, G. and Deseri, L.: On the analytic expression of the free energy in linear viscoelasticity. J. Elasticity, 43, 247-278 (1996).
4.
[4] Coleman, B. D. and Owen, D. R.: A mathematical foundation for thermodynamics. Arch. Ration. Mech. Anal., 54, 1-104 (1974).
5.
[5] Noll, W.: A new mathematical theory of simple materials. Arch. Ration. Mech. Anal., 48, 1-50 (1972).
6.
[6] Breuer, S. and Onat, E. T.: On recoverable work in linear viscoelasticity. ZAMP, 15, 12-21 (1964).
7.
[7] Day, W. A.: Reversibility, recoverable work and free energy in linear visco-elasticity. Q. J. Mech. Appl. Math., 23, 41-15 (1970).
8.
[8] Morro, A. and Vianello, M.: Minimal and maximal free energy for materials with memory. Boll. Unione Mat. Ital., 4/A, 45-55 (1990).
9.
[9] König, H. and Meixner, J.: Lineare Systeme und lineare Transformationen. Math. Nachr., 19, 265-322 (1958).
10.
[10] Coleman, B. D.: On thermodynamics, strain impulses, and viscoelasticity. Arch. Ration. Mech. Anal., 17, 230-254 (1964).
11.
[11] Coleman, B. D.: Thermodynamics of materials with memory. Arch. Ration. Mech. Anal., 17, 1-45 (1964).
12.
[12] Coleman, B. D. and Owen, D. R.: On thermodynamics and elastic-plastic materials. Arch. Ration. Mech. Anal., 59, 25-51 (1975).
13.
[13] Kolmogorov, A. N. and Fomin, S. V.: Introductory Real Analysis, Prentice-Hall, Englewood Cliffs, NJ, 1970.
14.
[14] Jeffery, R. L.: The Theory of Functions of a Real Variable, The University of Toronto Press, Toronto, 1951.
15.
[15] Day, W. A.: The Thermodynamics of Simple Materials with Fading Memory, Springer, Berlin, 1972.
16.
[16] Gurtin, M. E. and Herrera, I.: On dissipation inequalities and linear viscoelasticity. Q. Appl. Math., 23, 235-245 (1965).
17.
[17] Day, W. A.: Restrictions on relaxation functions in linear viscoelasticity. Q. J. Mech. Appl. Math., 24, 487-497 (1971).
18.
[18] Hill, R.: The Mathematical Theory of Plasticity, Oxford University Press, Oxford, 1950.
19.
[19] Drucker, D. C.: A more fundamental approach to stress-strain relations. Proc. 1st US Natl Congr. Appl. Mech., 487-491 (1951).
20.
[20] Il’iushin, A. A.: O postulate plastichnosti [On the postulate of plasticity]. Prikl. Math. i Mekh., 25, 503-507 (1961).
21.
[21] Day, W. A.: Thermodynamics based on a work axiom. Arch. Ration. Mech. Anal., 31, 1-34 (1968).
22.
[22] Moreau, J. J.: Sur les lois de frottement, de plasticité et de viscosité. C. R. Acad. Sci. A, 319-322 (1970).
23.
[23] Truesdell, C. and Noll, W.: The non-linear field theories of mechanics, in Handbuch der Physik III/3, Springer, Berlin, 1965.