T. Mishonov, I. Gentchev, R. Koleva, E. Penev, Influence of the orthorhombic distortion on the van Hove singularities in the DOS and ARPES spectra of layered cuprates, Superlattices and Microstructures, v. 24, No. 5, 1998, Article No sm 960483, p. 381-384

T. Mishonov, I. Gentchev, R. Koleva, E. Penev, Alternatives for Fermi level location in cubic bismuthates deduced from ACAR spectra, Superlattices and Microstructures, v. 21, No. 3, 1997, Article No sm 960420, p. 477-479