@inbook{273441259e5d47709cd4de8a8f63aca1,
title = "The Newman-Penrose Formalism",
abstract = "A tetrad field is a set of four orthonormal vectors defined at each point of spacetime. Although the differential geometry of such a structure immersed in a general Riemannian manifold was first considered by Ricci (1895), tetrads were used during the 1930s in connection with GR.",
author = "Pedro Bargue{\~n}o and Ernesto Contreras",
note = "Publisher Copyright: {\textcopyright} The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.",
year = "2023",
month = sep,
day = "27",
doi = "10.1007/978-3-031-42948-4\_3",
language = "Ingl{\'e}s",
series = "SpringerBriefs in Physics",
publisher = "Springer VS",
pages = "9--24",
booktitle = "SpringerBriefs in Physics",
}