1. Bhaskara Rao, K. P. S. and Bhaskara Rao, M. (1983). Theory of Charges, Academic Press.
2. De Simone, A. (2000). Absolute continuity of states on concrete logics. International Journal of Theoretical Physics 39(3), 615–620.
3. De Simone, A. and Pták, P. (in press). Extending coarse-grained measures. submitted for publication.
4. Gudder, S. (1979). Stochastic Methods in Quantum Mechanics, North Holland, New York.
5. Gudder, S. and Marchand, J. P. (1980). A coarse-grained measure theory. Bulletin de L'Academie Polonaise des Sciences 28(11–12), 557–564.