@article{IM2_1967_1_5_a1,
     author = {V. V. Zhikov},
     title = {On inverse {Sturm--Liouville} problems on a finite segment},
     journal = {Izvestiya. Mathematics },
     pages = {923--934},
     publisher = {mathdoc},
     volume = {1},
     number = {5},
     year = {1967},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1967_1_5_a1/}
}