R. Schoen and S.-T. Yau, Positivity of the total mass of a general space-time,
Phys. Rev. Lett. 43 (1979), no. 20, 1457--1459.
R. Schoen and S.-T. Yau, On the proof of the positive mass conjecture in general relativity,
Comm. Math. Phys. 65 (1979), no. 1, 45--76.
R. Schoen and S.-T. Yau, Proof of the positive mass theorem II,
Comm. Math. Phys. 79 (1981), no. 2, 231--260.
R. Schoen and S.-T. Yau, Proof that the Bondi mass is positive,
Phys. Rev. Lett. 48 (1982), no. 6, 369--371.
R. Schoen and S.-T. Yau, The existence of a black hole due to condensation of matter,
Comm. Math. Phys. 90 (1983), no. 4, 575--579
G. Huisken and S.-T. Yau, Definition of center of mass for isolated physical systems and unique foliations by stable spheres with constant mean curvature,
Invent. Math. 124 (1996), no. 1-3, 281--311.
S.-T. Yau, Geometry of three manifolds and existence of black hole due to boundary effect,
Adv. Theor. Math. Phys. 5 (2001), no. 4, 755--767.
M.-T. Wang and S.-T. Yau,
Quasilocal mass in general relativity, Phys. Rev. Lett. 102 (2009), no. 2, no. 021101, 4 pages.
M.-T. Wang and S.-T. Yau, Isometric embeddings into the Minkowski space and new quasi-local mass,
Comm. Math. Phys. 288 (2009), no. 3, 919--942.