On Fiber Products of Rational Elliptic Surfaces with Section. Chad Schoen (1988) Mathematische Zeitschrift
On non-holonomic irreducible D-modules. Joseph Bernstein, Valery Lunts (1988) Inventiones mathematicae
On the Lattice of Transcendental Cycles on an Elliptic Surface. Mangala Nori (1986) Mathematische Zeitschrift