2. Pentaatomic Tetracoordinate Planar Carbon, [CAl4]2-: A New Chemistry Structural Unit and Its Salt Complexes
    X. Li, H. F. Zhang, L. S. Wang, G. D. Geske, and A. I. Boldyrev
    Angew. Chem. Int. Ed. 39, 3630-3633 (2000).
    1. Tetracoordinated Planar Carbon in the Al4C- Anion. A Combined Photoelectron Spectroscopy and Ab Initio Study
    X. Li, L. S. Wang, A. I. Boldyrev, and J. Simons
    J. Am. Chem. Soc. 121, 6033-6038 (1999).