1. S. A. Demidova, “Application of the theory of integral invariants of Lie groups to certain aspects of integral geometry,” Dissertation, Kharkov (1956).
2. G. I. Drinfel’d, “On measure in Lie groups,” Khar’kov. Gos. Univ. Uch. Zap., 29 (1949)
3. G. I. Drinfel’d, “Some basic formulas of integral geometry. II,” Khar’kov. Gos. Univ. Univ. Uch. Zap., 40 (1952)
4. G. I. Drinfel’d, “Theory of integral invariants and integral geometry,” Proc. Third Ail-Union Math. Congress, Vol. I [in Russian], Akad. Nauk SSSR, Moscow (1956), p. 151.
5. G. I. Drinfel’d, “Computation of an affine arc and of an affine area,” Ukr. Geometr. Sb., (1968).