Ronald Cools Luc Pluym Dirk Laurie Algorithm 764: Cubpack++: A C++ Package for Automatic Two-Dimensional Cubature. 1-15 1997 23 ACM Trans. Math. Softw. 1 http://doi.acm.org/10.1145/244768.244770 db/journals/toms/toms23.html#CoolsPL97