On the Analytic Continuation of Eisenstein Series for Siegel's Modular Group of Degree n. Christian Ulrich (1983) Monatshefte für Mathematik
On the Eisenstein series of Hilbert modular groups. Goro Shimura (1985) Revista Matemática Iberoamericana
On the Structure of a Graded Ring of Automorphic Forms on the 2-Dimensional Complex Ball. II. H.L. Resnikoff, Y.-S. Tai (1981) Mathematische Annalen
On the Structure of a Graded Ring of Automorphic Forms on the 2-Dimensional Complex Ball. H.L. Resnikoff, Y.-S. Tai (1978) Mathematische Annalen