Bounds for the variation of the roots of a polynomial and the eigenvalues of a matrix
In: Linear algebra and its applications, Jg. 142, S. 195-209
The Hoffman-Wielandt inequality in infinite dimensions
In: Proceedings of the Indian Academy of Sciences, Mathematical Sciences, Jg. 104 H. 3, S. 483-494On the variation of permanents
In: Linear and multilinear algebra, Jg. 27 H. 2, S. 105-110The q-binomial theorem and spectral symmetry
In: Indagationes mathematicae, Jg. 4 H. 1, S. 11-16Symmetries and variation of spectra
In: Canadian journal of mathematics, Jg. 44 H. 6, S. 1155-1166