1. BILLINGSLEY, P., Convergence of Probability Measures, Wiley, 1968.
2. CHUNG, K.L. and WILLIAMS, R.J., Introduction to Stochastic Integration, Birkäuser, 1983.
3. COX, M.R. and MILLER, H.D., The Theory of Stochastic Processes, Chapman and Hall, 1980.
4. DESCLOUX, J. and TOLLEY, M., An accurate algorithm for computing the eigenvalues of polygonal membrane; Comp.Meth.Appl.Mech. and Engineering 39, 37–53, 1983.
5. FELLER, W., Introduction to Probability Theory and its Applications, Vol. I, Wiley, 1970.