Energy average formula of photon gas rederived by using the generalised Hermann–Feynman theorem
范洪义, 姜年权
Energy average formula of photon gas rederived by using the generalised Hermann–Feynman theorem
Fan Hong-Yi(范洪义) and Jiang Nian-Quan(姜年权)
中国物理B . 2010, (9): 90301 -090301 .  DOI: 10.1088/1674-1056/19/9/090301