Effect of number density on velocity distributions in a driven quasi-two-dimensional granular gas
Sajjad Hussain Shah, Li Yin-Chang(李寅阊), and Hou Mei-Ying (厚美瑛)
Chin. Phys. B . 2010, (10): 108203 -108203 .  DOI: 10.1088/1674-1056/19/10/108203