@article{PIM_1994_N_S_55_69_a7,
     author = {Milutin Dostani\'c},
     title = {Trace {Formulas} of {Gelfand--levitan} {Type}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {51 },
     year = {1994},
     volume = {_N_S_55},
     number = {69},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1994_N_S_55_69_a7/}
}