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doi.org
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Arkani-Hamed, Nima; Motl, Luboš; Nicolis, Alberto; Vafa, Cumrun (2007). ”The String Landscape, Black Holes and Gravity as the Weakest Force”. Journal of High Energy Physics 2007 (6): sid. 60. doi:10.1088/1126-6708/2007/06/060. Bibcode: 2007JHEP...06..060A.