The perron root of a weighted geometric mean of nonnegative matrices
In: Linear and multilinear algebra, Jg. 24 H. 1, S. 1-13
Perturbation and interlace theorems for the unitary eigenvalue problem
In: Linear algebra and its applications, Jg. 188-189, S. 207-229Perturbation theorems for the generalized eigenvalue problem
In: Linear algebra and its applications, Jg. 48 H. DEC, S. 341-357Perturbation theorems for the joint spectrum of commuting matrices: a conservative approach
In: Linear algebra and its applications, Jg. 208-209, S. 83-95Perturbation theorems for the matrix eigenvalue problem
In: Portugaliae Mathematica, Jg. 43 H. 1, S. 69-76