The authors want to bound the wrapping effect for the solutions of a system of linear ordinary differential equations under two-point boundary value conditions. Using known result on the multiplication of interval matrices they show that the usual exponential growth of the wrapping effect can be reduced to polynomial growth by the so called odd/even reduction. - It seems that the authors are unaware of the fact that in their case the wrapping effect can be completely eliminatedö For initial value problems this is, e.g., discussed by the reviewer [ZAMM 66, 513-523 (1986; Zbl 0619.65063)]. This approach can also be used to solve the problem treated here.