The phrase 'the problem concerns' is correct and can be used in written English.
For example, you could write: "The problem concerns the lack of resources in this region."
The problem concerns the nature of design representations.
The general statement of the problem concerns the following two important challenges.
The problem concerns a single hole in a plate under different far-field in-plane loading conditions.
The second part of the problem concerns the passage of the waves through the intervening rocks to the site and the effect of geologic conditions.
The problem concerns a rotary joint on the right side of the station that turns the station's solar arrays so they face the sun during orbit.
The nub of the problem concerns the closing, or settlement, costs, a bewildering blizzard of fees that can grow beyond a borrower's expectations.
A hybrid identification method is thus proposed for the problem concerned.
The problem concerning the triggering of ruptures is beyond the scope of this paper.
However, the problem concerning the mechanisms of electron transport over these organelles still remains understudied.
The problem concerning zeros of the quasipolynomial P is original and must be solved by specific procedures (see, e.g. [12]).
Wang et al. [20] considered the problem, concerning effective yet secure ranked keyword search over encrypted cloud data.
