ON THE COMPACTNESS AND SPECTRA OF THE GENERALIZED DIFFERENCE OPERATOR ON THE SPACES ℓ∞ AND BV Article El-Shabrawy S.R., Sawano Y. Operators and Matrices. Element D.O.O.. Vol. 15. 2021. P. 959-983
INTERNATIONAL ARCHIVES OF OCCUPATIONAL AND ENVIRONMENTAL HEALTH Journal Springer Science and Business Media Deutschland GmbH.