Our studies concern some aspects of scattering theory of the singular differential systems y ′ − x −1 Ay − q(x)y = ρBy, x > 0 with n × n matrices A, B, q(x), x ∈ (0, ∞), where A, B are constant and ρ is a spectral parameter. We concentrate on the important special case when q(•) is smooth and q(0) = 0 and derive a formula that express such q(•) in the form of some special contour integral, where the kernel can be written in terms of the Weyl -type solutions of the considered differential system. Formulas of such a type play an important role in constructive solution of inverse scattering problems: use of such formulas, where the terms in their right-hand sides are previously found from the so-called main equation, provides a final step of the solution procedure. In order to obtain the above-mentioned reconstruction formula we establish first the asymptotical expansions for the Weyl -type solutions as ρ → ∞ with o (ρ −1 ) rate remainder estimate.