%0 Journal Article %A Kowalski, Oldřich %A Vlášek, Zdeněk %T On special Riemannian $3$-manifolds with distinct constant Ricci eigenvalues %J Mathematica Bohemica %D 1999 %P 45-66 %V 124 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/MB.1999.125981/ %R 10.21136/MB.1999.125981 %G en %F 10_21136_MB_1999_125981