12 March 2021 by Shing-Chi Leung and others

10 June 2020 by G. Stockinger and others

23 November 2019 by Heamin Ko and others

10 October 2019 by Nozomu Tominaga and others

9 June 2019 by Alexey Tolstov and others

8 February 2019 by Chris Fryer and others at LANL

7 December 2018 by Danfeng Xiang and others

7 October 2018 by Sung-Chul Yoon and others

18 July 2017 by Alexey Tolstov and others

14 February 2017 by Franz Erik Bauer and others

9 December 2016 by Alexey Tolstov and others

4 October 2016 by Alexandra Kozyreva and others

7 September 2016 by Elena Sorokina and others

29 February 2016 by Alexey Tolstov and others

27 February 2016 by Alexey Tolstov and others

24 May 2014 by Hirotaka Ito and others

18 June 2013 by Masaomi Ono and others