Octet baryon magnetic moments at next-to-next-to-leading order in covariant chiral perturbation theoryYang Xiao, Xiu-Lei Ren, Jun-Xu Lu, Li-Sheng Geng and Ulf-G. MeißnerEur. Phys. J. C, 78 6 (2018) 489DOI: https://doi.org/10.1140/epjc/s10052-018-5960-4