2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/192012The internal structure of the tetrads in a Poincaré non linear gauge theory of gravity is considered. Minkowskian coordinates becomes dynamical degrees of freedom playing the role of Goldstone bosons of the translations. A critical length allowing a covariant expansion similar to the weak field approach is deduced, the zeroth order metric being maximally symmetric (Minkowskian in some cases).17 pages, LaTeXGeneral Relativity and Quantum Cosmologytext