@article{DAN_1978_242_3_a4,
     author = {M. G. Krein and I. E. Ovcharenko},
     title = {Inverse problems for {Q-functions} and resolvent matrices of positive hermitian operators},
     journal = {Doklady Akademii Nauk},
     pages = {521--524},
     publisher = {mathdoc},
     volume = {242},
     number = {3},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_242_3_a4/}
}