%0 Journal Article %A Ya. M. Dymarskii %T On topological properties of manifolds of eigenfunctions generated by a~family of periodic Sturm--Liouville problems %J Contemporary Mathematics. Fundamental Directions %D 2006 %P 22-37 %V 16 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMFD_2006_16_a2/ %G ru %F CMFD_2006_16_a2