We review the current information about the eigenvalues of the quark mass matrix. The theoretical problems involved in a determination of the running masses mu, md, ms, mc and mb from experiment are discussed with the aim of getting reliable numerical values equipped with error bars that represent a conservative estimate of remaining uncertainties. © 1982.
Gasser, J., & Leutwyler, H. (1982). Quark masses. Physics Reports. https://doi.org/10.1016/0370-1573(82)90035-7