1. On existence of subsets of finite measure of sets of infinite measure;Besicovitch, A. S.;Nederl. Akad. Wetensch. Proc. Ser. A. {\bf55} = Indagationes Math.,1952
2. The measure of product and cylinder sets;Besicovitch, A. S.;J. London Math. Soc.,1945
3. J. E. Brothers, Integral geometry in homogeneous spaces, Ph. D. thesis, Brown University, Providence, R. I., 1964.
4. On integral geometry in Klein spaces;Chern, Shiing-shen;Ann. of Math. (2),1942
5. Theory of Lie Groups (PMS-8)