@article{TIMM_1996_4_a12,
     author = {A. L. Rublev},
     title = {On approximation of the differentiation operator over the class of twice differentiable functions in the space $L_2(0,\infty)$},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {162--170},
     publisher = {mathdoc},
     volume = {4},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_1996_4_a12/}
}