Hyperfine structure of muonic mesomolecules tdµ, tpµ, dpµ in variational method A.V. Eskin, V.I. Korobov, A.P. Martynenko and V.V. Sorokin EPJ Web Conf., 222 (2019) 03011 Published online: 19 November 2019 DOI: 10.1051/epjconf/201922203011