  \noindent Using results drawn from the pages of PRL\cite{Zhu2014}, the
authors comment on \textquotedblleft Semiconducting Layered Blue Phosphorus: A
Computational Study\textquotedblright. In recent letter\cite{Zhu2014} unknown
phase of phosphorus with high stability and a wide fundamental gap was proposed
by Zhu, and Tom\'anek. The first half of the comment questioned elements of
phosphorus blue structure, while the second half devoted to van der Waals
forces between AB stacked blue phosphorus layers which missed by them.
