Li, Li-Xin High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;
Li, L.-X., & Paczyński, B. (2006). Improved correlation between the variability and peak luminosity of gamma-ray bursts. Monthly Notices of the Royal Astronomical Society, 366(1), 219-226. doi:10.1111/j.1365-2966.2005.09836.x.