1. H. Becker,Varadarajan’s theorem for Polish groups, hand-written notes, April 1991.
2. R. B. Chuaqui,Measures invariant under a group of transformations, Pac. J. Math.68 (1977), 313–329.
3. A. Hajian and Y. Ito,Weakly wandering sets and invariant measures for a group of transformations, J. Math. Mech.18 (1969), 1203–1216.
4. P. R. Halmos,Lectures on Ergodic Theory, Publ. Math. Soc. Japan, Tokyo, 1956.
5. E. Hopf,Theory of measures and invariant integrals, Trans. Amer. Math. Soc.34 (1932), 373–393.