Quasi-local energy in presence of gravitational radiation
  We discuss our recent work [4] in which gravitational radiation was studied by evaluating the Wang-Yau quasi-local mass of surfaces of fixed size at the infinity of both axial and polar perturbations of the Schwarzschild spacetime, \`{a} la Chandrasekhar [1]. 
Po-Ning Chen, Mu-Tao Wang, and Shing-Tung Yau
math.DG gr-qc