@article{MZM_2011_89_3_a7,
     author = {A. W. Niukkanen},
     title = {Transformation of the {Triple} {Series} of {Gelfand,} {Graev,} and {Retakh} into a {Series} of the {Same} {Type} and {Related} {Problems}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {384--392},
     publisher = {mathdoc},
     volume = {89},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2011_89_3_a7/}
}