1. Atiyah M. F.,Resolution of singularities and division of distributions, Comm. Pure Appl. Math. 23 (1970), 145–150.
2. Bernstein, I. N.—Gel’fand S. I.,Meromorphic property of the function Pλ, Funkcional Anal. i Priložen 3 (1969), 84–85.
3. Cattabriga L.—De Giorgi E.,Soluzioni di equazioni differenziali a coefficienti costanti appartenenti in un semispazio a certe classi di Gevrey, Boll. Un. Mat. Ital. (4) 12 (1975), 324–348.
4. Cattabriga L.,Fundamental solutions with singular support contained in a cone or in a half-space. Applications, Confer. Sem. Mat. Univ. Bari 151 (1978), 1–24.
5. Enqvist A.,On tempered fundamental solutions supported by a convex cone, Ark. Mat. 14 (1976), 35–41.