@article{DAN_1965_165_6_a0,
     author = {M. Sh. Birman and M. Z. Solomyak},
     title = {On double {Stieltjes} operator integrals},
     journal = {Doklady Akademii Nauk},
     pages = {1223--1226},
     publisher = {mathdoc},
     volume = {165},
     number = {6},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_165_6_a0/}
}