Volume 9, Issue 2 Wen-Li Wang Jing-Feng Tian Nonlinear boundary value problems for impulsive differential equations with causal 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 Wen-Li Wang Jing-Feng Tian Find more articles with the same keywords nonlinear boundary value problems causal operators monotone iterative technique extremal solutions Find more articles with the same subject classes 34B37