Volume 9, Issue 2 Zhengxin Zhou Lina Xie On a generalization of the Liouville formula 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 Zhengxin Zhou Lina Xie Find more articles with the same keywords Liouville formula nonlinear differential system the first integral Find more articles with the same subject classes 34A12 34A34