1. 1937 [1] Saks, S., Theory of the Integral, Monografie Matematyczne, Tom VII, Warsaw. Translated by L. C. Young. New York: Stechert & Co.
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. 1957 [1] Hille, E., & R. S. Phillips, Functional Analysis and Semi-Groups. American Math. Soc. Colloquium Publications, Vol. XXXI, Providence.
5. 1958 [1] Dunford, N., & J. T. Schwartz, Linear Operators, Parti. New York: Interscience Publishers.