Wave zone in the Hořava–Lifshitz theory at the kinetic-conformal point in the low energy regime J. Mestra-Páez, J. M. Peña and A. Restuccia Eur. Phys. J. C, 81 10 (2021) 923 Published online: 20 October 2021 DOI: 10.1140/epjc/s10052-021-09720-6