Tian Zi-Ning, Ouyang Xiao-Ping, Chen Wei, Wang Xue-Mei, Deng Ning, Liu Wen-Biao, Tian Yan-Jie. Source boundary parameter of Monte Carlo inversion technology based on virtual source principleJ. Acta Physica Sinica, 2019, 68(23): 232901. DOI: 10.7498/aps.68.20191095