1 Correction to: Japan Journal of Industrial and Applied Mathematics https://doi.org/10.1007/s13160-022-00533-y

In the original publication of the article, the proof of Theorem 4.2 contains the following equations:

$$\begin{aligned} \int _{\varphi (0)}^{x(t)}\frac{d\xi }{f(\xi )}=\int _{0}^{t}g(x(s-1))ds. \end{aligned}$$

\(f(x)>0\,\lim _{t\rightarrow T-}x(t)=\infty \), which should be deleted. The proof of Theorem 4.2 should read without those equations.

The original article has been corrected.