Dirichlet boundary condition for the Lee–Wick-like scalar model L. H. C. Borges, A. A. Nogueira, E. H. Rodrigues and F. A. Barone Eur. Phys. J. C, 80 11 (2020) 1082 Published online: 23 November 2020 DOI: 10.1140/epjc/s10052-020-08669-2