Barrieu P and Schoutens W  ‘Iterates of the infinitesimal generators, spacetime harmonic polynomia

Barrieu, P. and Schoutens, W. (2006) ‘Iterates of the infinitesimal generators and space-time harmonic polynomials of a Markov process’, Journal of Computational and Applied Mathematics, 186 1: 300-323. ISSN 0377-0427. DOI: 10.1016/j.cam.2005.04.014.