Differential Equations & Applications · Volume 8, Issue 3 Second-order functional problems with a resonance of dimension one 08-18 Pages 349-365 DOI 10.7153/dea-08-18 Downloads Short PDF Full PDF PNG Authors Nickolai Kosmatov Weihua Jiang Keywords Carathéodory conditions coincidence degree theory functional condition pendulum equation resonance Subject classes 34B10 34B15