Goldman, T.; Cooper, F.; Nieto, M.M. (Los Alamos National Lab., NM (United States)) & Perez-Mercader, J. (Consejo Superior de Investigaciones Cientificas, Madrid (Spain). Inst. de Fisica Fundamental Los Alamos National Lab., NM (United States)). Dark matter and the effective value of Newton's constant at large distances, article, January 1, 1991; (https://digital.library.unt.edu/ark:/67531/metadc1067814/m1/1/: accessed November 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .