You may also wish to search for items by Varga.
Only one matching reference was found.
Vondrak, T.; Mach, K.; Varga, V.; Terpstra, A., Frontier occupied orbitals in methyl-substituted fulvene and dimethylenecyclopentenyltitanium complexes by UV-photoelectron spectroscopy and EHT calculations, J. Organomet. Chem., 1992, 425, 27. [all data]