Volume 8, Issue 4 Sajid Iqbal Josip Pečarić Muhammad Samraiz Opial-type inequalities for two functions with general kernels and applications 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 Sajid Iqbal Josip Pečarić Muhammad Samraiz Find more articles with the same keywords Opial inequality fractional derivatives Widder derivatives Green's function linear differential operator Find more articles with the same subject classes 26D15 26D10 26A33