Pittner, J., Gonzales, H. V., Gdanitz, R. J., Čársky, P. The Performance of the Multireference Brillouin-Wigner Coupled Cluster Singles and Doubles Method on the Insertion of Be into H2. Chemical Physics Letters. 2004, 386(1/3), 211-215. ISSN 0009-2614. E-ISSN 1873-4448.