Zarrabian

Coupled-cluster approaches with an approximate account of triexcitations and the optimized-inner-projection technique. III. Lower bounds to the ground-state correlation energy of cyclic-polyene model systems.

Piecuch, Paldus, Zarrabian, 1990, Physical review. A, Atomic, molecular, and optical physics.

Convergence properties of multireference many-body perturbation theory.

Bartlett, Zarrabian, Laidig, 1990, Physical review. A, Atomic, molecular, and optical physics.