@article{JSFU_2009_2_4_a6,
     author = {Evgeny K. Leinartas and Alexander P. Lyapin},
     title = {On the {Rationality} of {Multidimentional} {Recusive} {Series}},
     journal = {\v{Z}urnal Sibirskogo federalʹnogo universiteta. Matematika i fizika},
     pages = {449--455},
     publisher = {mathdoc},
     volume = {2},
     number = {4},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JSFU_2009_2_4_a6/}
}