Shao, Li Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;
Zhang, Y., Hou, Z., Shao, L., & Zhang, P. (2010). Discovery of a high confidence soft lag from an X-ray flare of Markarian 421. Science China-Physics, Mechanics & Astronomy, 53(Suppl. 1), 224-227. doi:10.1007/s11433-010-0017-1.