arxiv:1907.02550
%%% BibTeX

@Article{Fuentes-Martin:2019bue,
 author        = "Javier Fuentes-Martin and Mario Reig and Avelino Vicente",
 title         = "4321... axion!",
 journal       = "Phys.Rev.",
 volume        = "D100",
 pages         = "115028",
 year          = "2019",
 eprint        = "1907.02550",
 archivePrefix = "arXiv",
 primaryclass = "hep-ph",
}

@Article{1907.02550, crossref = "Fuentes-Martin:2019bue"}

%%% LaTeX

\cite{Fuentes-Martin:2019bue}

%%% bibitem EU

\bibitem{Fuentes-Martin:2019bue}
Javier Fuentes-Martin, Mario Reig, Avelino Vicente,
%"4321... axion!",
Phys.Rev. \textbf{D100} (2019) 115028,
arXiv:1907.02550.

%%% bibitem US

\bibitem{Fuentes-Martin:2019bue}
Javier Fuentes-Martin, Mario Reig, Avelino Vicente,
%"4321... axion!",
Phys.Rev. \textbf{D100}, 115028 (2019),
arXiv:1907.02550.