title: Comment on "generating high-current monoenergetic proton beams by a circularly polarized laser pulse in the phase-stable acceleration regime".
authors: Liangliang
authors: L
authors: Ji
authors: Baifei
authors: B
authors: Shen
authors: Xiaomei
authors: X
authors: Zhang
authors: Fengchao
authors: F
authors: Wang
authors: Zhangying
authors: Z
authors: Jin
authors: Meng
authors: M
authors: Wen
authors: Wenpeng
authors: W
authors: Wang
authors: Jiancai
authors: J
authors: Xu