Preeda Patcharamaneepakorn และ Auttakit Chatrabhuti. (2007) Stability of extra dimensions in O(d,d)-covariant string gas cosmology. Chulalongkorn University:ม.ป.ท.Preeda Patcharamaneepakorn และ Auttakit Chatrabhuti. 2007. Stability of extra dimensions in O(d,d)-covariant string gas cosmology. ม.ป.ท.:Chulalongkorn University;Preeda Patcharamaneepakorn และ Auttakit Chatrabhuti. Stability of extra dimensions in O(d,d)-covariant string gas cosmology. ม.ป.ท.:Chulalongkorn University, 2007. Print.