6 April 2024 by I. Del Moral-Sanchez and others at University of Amsterdam

19 October 2023 by R. Raychev and others at UC Los Angeles

11 July 2022 by Yunsen Xian and others

17 July 2021 by Jùn Líu and others

25 July 2019 by Mohammad Merdan and Yunsen Xian

17 January 2019 by Pierre Pantaleon and others

30 January 2018 by Pierre Pantaleon and Yunsen Xian

15 September 2017 by Yang Xian and Yingli Tian

6 September 2017 by Pierre Pantaleon and Yang Xian

29 April 2017 by Pierre Pantaleon and Yunsen Xian

2 November 2015 by Wissam Ameen and others at ASTRON

17 December 2013 by Yunsen Xian and Mohammad Merdan

28 March 2013 by Mohammad Merdan and Yunsen Xian

12 October 2012 by Mohammad Merdan and Yunsen Xian

9 September 2011 by Mohammad Merdan and Yunsen Xian

11 May 2011 by Yunsen Xian

14 December 2007 by Yunsen Xian

19 January 2007 by Yunsen Xian

4 July 2006 by Yunsen Xian

7 June 2005 by Yunsen Xian

4 July 2002 by Yunsen Xian

4 January 1995 by Yunsen Xian

31 October 1994 by R. Bishop and others

29 July 1994 by Yang Xian

28 April 1994 by Yang Xian

4 November 1993 by Yunsen Xian