@article{RM_1989_44_1_a30,
     author = {A. I. Zhivkov},
     title = {Isospectral classes of matrix-valued finite-gap operators with symmetries},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {269--270},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1989_44_1_a30/}
}