Rohit Chadha Mahesh Viswanathan Ramesh Viswanathan Least Upper Bounds for Probability Measures and Their Applications to Abstractions. 264-278 2008 CONCUR http://dx.doi.org/10.1007/978-3-540-85361-9_23 conf/concur/2008 db/conf/concur/concur2008.html#ChadhaVV08