1. [1] S. Abdulali, Absolute Hodge cycles in Kuga fiber varieties, thesis, State University of New York, Stony Brook, 1985.
2. [2] S. Addington, Equivariant holomorphic maps of symmetric domains, Duke Math. J. 55 (1987), no. 1, 65–88.
3. [3] A. Borel, Density and maximality of arithmetic subgroups, J. Reine Angew. Math. 224 (1966), 78–89.
4. [4] A. Borel, Some metric properties of arithmetic quotients of symmetric spaces and an extension theorem, J. Differential Geometry 6 (1972), 543–560.
5. [5] P. Deligne, Formes modulaires et représentations $\ell$-adiques, Sém. Bourbaki exp. 355 (1969), Lecture Notes in Math., vol. 179, Springer-Verlag, Berlin-Heidelberg-New York, 1971, pp. 139–172.