E. Behrends: Elementary Stochastics, Springer, 2013
H.-O. Georgii: Stochastics: Introduction to Probability Theory and Statistics, De Gruyter, 2007
U. Krengel: Introduction to probability theory and statistics, Vieweg, 2005
D. Meintrup, S. Schäffler, Stochastics: Theory and Applications, Springer, 2005.
Most of the books listed below are available online at the UB. For this purpose, there is an extensive hand apparatus for stochastics in the mathematic library.