Martingales in discrete time and elementary theorems; introcuction to processes in continuous time: Brownian motion; introduction to time series analysis: stationary processes (in discrete time), auto covariance function, ARMA processes, estimation and forecasting.
Zdzislaw Brzezniak and Tomasz Zastawniak. Basic Stochastic Processes. Springer, 200.
P. J. Brockwell and R. A. Davis. Introduction to time series analysis and forecasting. Springer, 2002.