Volume 8, Issue 3 Nickolai Kosmatov Weihua Jiang Second-order functional problems with a resonance of dimension one 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 Nickolai Kosmatov Weihua Jiang Find more articles with the same keywords Carathéodory conditions coincidence degree theory functional condition pendulum equation resonance Find more articles with the same subject classes 34B10 34B15