Chang, Sheldon Xu-Dong (1988), "Two-dimensional area minimizing integral currents are classical minimal surfaces", Journal of the American Mathematical Society, 1 (4): 699–778, doi:10.2307/1990991, JSTOR1990991
Chang, Sheldon Xu-Dong (1988), "Two-dimensional area minimizing integral currents are classical minimal surfaces", Journal of the American Mathematical Society, 1 (4): 699–778, doi:10.2307/1990991, JSTOR1990991