Media type: E-Article Title: A Curvature Identity on a 4-Dimensional Riemannian Manifold Contributor: Euh, Yunhee; Park, JeongHyeong; Sekigawa, Kouei imprint: Springer Science and Business Media LLC, 2013 Published in: Results in Mathematics Language: English DOI: 10.1007/s00025-011-0164-3 ISSN: 1422-6383; 1420-9012 Origination: Footnote: