Ergodicity conditions for a class of two-dimensional queueing problems / Hendrik NautaMetric and arithmetic results for continued fraction expansions / Cornelis KraaikampGeometrically ergodic Markov chains and the optimal control of queues / door Flora Margaretha SpieksmaLimit theorems for random sets / Grzegorz Edward KrupaProbability, random processes, and ergodic properties / Robert M. Gray