Volume 13, Issue 3 Sid Ahmed Ould Ahmed Mahmoud Ould Beinane Sid Ahmed On the classes of (n,m)-power D-normal and (n,m)-power D-quasi-normal operators Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Sid Ahmed Ould Ahmed Mahmoud Ould Beinane Sid Ahmed Find more articles with the same keywords (m,n)-power normal (m,n)-power quasi-normal n-power D-normal n-power D-quasi-normal Find more articles with the same subject classes 47B15 47B20 47A15