Zulfiqar Habib Manabu Sakai G2 Two-Point Hermite Rational Cubic Interpolation. 1225-1231 2002 79 Int. J. Comput. Math. 11 http://taylorandfrancis.metapress.com/openurl.asp?genre=article&issn=0020-7160&volume=79&issue=11&spage=1225 db/journals/ijcm/ijcm79.html#HabibS02