1. A. Tan et al. [PandaX-II Collaboration], Phys. Rev. Lett. 117(12), 121303 (2016).
arXiv:1607.07400
[hep-ex]
2. D.S. Akerib et al. [LUX Collaboration], Phys. Rev. Lett. 118(2), 021303 (2017).
arXiv:1608.07648
[astro-ph.CO]
3. E. Aprile et al. [XENON Collaboration], Phys. Rev. Lett. 119(18), 181301 (2017).
arXiv:1705.06655
[astro-ph.CO]
4. E. Aprile et al. [XENON Collaboration].
arXiv:1805.12562
[astro-ph.CO]
5. C. Amole et al. [PICO Collaboration], Phys. Rev. D 93(6), 061101 (2016).
arXiv:1601.03729
[astro-ph.CO]