1. Argabright, L. N. (1966), A note on invariant integrals on locally compact semigroups, Proc. Amer. Math. Soc.
17, 377–382.
2. Henrici, P. (1974), Applied and Computational Complex Analysis, Vol. 1 (John Wiley & Sons, New York-London-Sydney-Toronto).
3. Högnäs, G. (1988), Invariant measures and random walks on the semigroup of matrices. In Heinz Langer (ed.): Proceedings of the conference on Markov Processes and Stochastic Control, Gaußig, DDR, 11–15 January, 1988 (to appear).
4. Högnäs, G. and A. Mukherjea (1980), Recurrent random walks and invariant measures on semigroups of n × n matrices, Math. Z.
173, 69–94.
5. Michael, J. H. (1964), Right invariant integrals on locally compact semigroups, J. Austral. Math. Soc.
4, 273–286.