Functions of bounded variation and the Lebesgue-Stieltjes integral § 1. Euclidean spaces § 2. Intervals and figures § 3. Functions of an interval § 4. Functions of an interval that are additive and of bounded variation § 5. Lebesgue-Stieltjes integral. Lebesgue integral and measure § 6. Measure defined by a non-negative additive function of an interval § 7. Theorems of Lusin and Vitali-Carathéodory § 8. Theorem of Fubini § 9. Fubini's theorem in abstract spaces § 10. Geometrical definition of the Lebesgue-Stieltjes integral § 11. Translations of sets § 12. Absolutely continuous functions of an interval § 13. Functions of a real variable § 14. Integration by parts