Hermitian structures on the product of Sasakian manifolds
  We investigate the curvature properties of a two-parameter family of Hermitian structures on the product of two Sasakian manifolds, as well as intermediate relations. We give a necessary and sufficient condition for a Hermitian structure belonging to the family to be Einstein and provide concrete examples. 
Jung Chan Lee, JeongHyeong Park, and Kouei Sekigawa
math.DG