[1] C. S. Hönig: Volteгra-Stieltjes Integral Equations. Mathematical Studies 16, North Holland Pub. Comp., Amsterdam, 1975.

[2] M. Morse, W. Transue: A Calculus for Fréchet Variations. Journal of Indian Math. Soc. XIV (1950), 65-117. MR 0039043 | Zbl 0040.05801

[3] M. Morse, W. Transue: The Fréchet variation in the small, sector limits, and left decompositions. Canadian Journal of Math. 2 (1950), 344-374. MR 0037340

[4] G. C. Rocha-Filho: Integral de Riemann Vetorial e Geometria dos Espaços de Banach. doctoral thesis, IME-USP, 1979.

[5] J. A. Clarkson, C. R. Adams: On defìnitions of bounded variation for functions of two variables. Trans. Am. Math. Soc. 35 (1933), 824-854. MR 1501718

[6] M. Fréchet: Sur les fonctionnelles bilineaires. Trans. Amer. Math. Soc. (1915), 215-234. MR 1501010

[7] N. Dunford, J. T. Schwartz: Linear Operators. paгt I, p. 337, Interscience, 1967.