1. 1875 [1]Gibbs, J. W., Trans. Connecticut Acad. 3, 108–248, 324–524 (1875–1878).
2. 1953 [1]Lorentz, G. G., & D. G. Wertheim, Canadian J. Math. 5, 568–575.
3. 1956 [1]Luxemburg, W. A. J., & A. C. Zaanen, Proc. Acad. Sci. Amsterdam 59, 110–119.
4. 1958 [1]Dunford, N., & J. T. Schwartz, Linear Operators, Part I. New York: Interscience.
5. 1959 [1]Krasovskii, N. N., Stability of Motion, Moscow. Translated by J. L. Brenner. Stanford Press.