1. Localization of eigenvalues of matrices and applications /Russian translation/;Parodi,1960
2. Isolation of Gershgorin discs;Van At;Zh. vych. Mat. i mat. Fiz.,1977
3. Diagonal similarity transformations which isolate Gershgorin disks;Porching;Numer. Math.,1966
4. Theory of matrices /Russian translation/;Lancaster,1978