@article{DAN_1965_164_5_a8,
     author = {M. A. Rutman},
     title = {An integral representation of functions forming a {Markov} series},
     journal = {Doklady Akademii Nauk},
     pages = {989--992},
     publisher = {mathdoc},
     volume = {164},
     number = {5},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_164_5_a8/}
}