1. Optimal stopping problems for Brownian motion;Bather;Adv. Appl. Prob.,1970
2. Convergence of Probability Measures;Billingsley,1968
3. Probability;Breiman,1968
4. Optimal selection of stopping time for a Markov process;Dynkin;Dokl. Akad. Nauk USSR,1963
5. Optimal selection of stopping time for a Markov process;Dynkin;Soviet Math.,1963