![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]()
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 systemsPiecuch, Piotr; Zarrabian, Sohrab; Paldus, Josef; Čižek, Jiří · Physical Review A · 1990