TY - JOUR AU - Carlo Alberto Mantica AU - Luca Guido Molinari TI - A second-order identity for the Riemann tensor and applications JO - Colloquium Mathematicum PY - 2011 SP - 69 EP - 82 VL - 122 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/cm122-1-7/ DO - 10.4064/cm122-1-7 LA - en ID - 10_4064_cm122_1_7 ER -