Absolute parameters for binary systems - II. The late-type system ZZ Ursae MajorisR. Clement, M. García, V. Reglero, J. Suso and J. FabregatAstron. Astrophys. Suppl. Ser., 125 3 (1997) 529-537DOI: https://doi.org/10.1051/aas:1997381