@article{TIMM_1992_2_a10,
     author = {P. A. Shulimanov},
     title = {The upper bound of the best rational approximation of entire functions on the positive semi-axis},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {120--127},
     publisher = {mathdoc},
     volume = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_1992_2_a10/}
}