Volume 11, Issue 2 Bo Yang Positive solutions to a nonlinear sixth order boundary value problem 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 Bo Yang Find more articles with the same keywords sixth order boundary value problems positive solutions upper and lower estimates Green's function Find more articles with the same subject classes 34B15 34B18