by Bu, De-Fu, Qiao, Er-Lin, Yang, Xiao-Hong
Published in arXiv.org (26.03.2019)

by Yu-Tao, Sun, Jie-Ying, Liu, Jin-zhong, Liu, Yan-Li, Ai, Ming, Zhou, Er-lin, Qiao
Published in Chinese astronomy and astrophysics (01.04.2011)