Catterina Dagnino Vittoria Demichelis Computational Aspects of Numerical Integration Based on Optimal Nodal Splines. 243-255 2003 80 Int. J. Comput. Math. 2 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=0020-7160&volume=80&issue=2&spage=243 db/journals/ijcm/ijcm80.html#DagninoD03