Sandeep Juneja R. L. Karandikar Perwez Shahabuddin Asymptotics and fast simulation for tail probabilities of maximum of sums of few random variables. 2007 17 ACM Trans. Model. Comput. Simul. 2 http://doi.acm.org/10.1145/1225275.1225278 db/journals/tomacs/tomacs17.html#JunejaKS07