Brandenberger, RobertRobertBrandenbergerPEI-MING HO2018-09-102018-09-102002-03http://inspirehep.net/record/584044http://scholars.lib.ntu.edu.tw/handle/123456789/297734Noncommutative space-time, stringy space-time uncertainty principle, and density fluctuationsjournal article10.1103/PhysRevD.66.023517