Killing forms on the five-dimensional Einstein-Sasaki Y(p,q) spaces
  We present the complete set of Killing-Yano tensors on the five-dimensional Einstein-Sasaki Y(p,q) spaces. Two new Killing-Yano tensors are identified, associated with the complex volume form of the Calabi-Yau metric cone. The corresponding hidden symmetries are not anomalous and the geodesic equations are superintegrable. 
Mihai Visinescu
math-ph hep-th math.MP