@article{TIMM_2012_18_4_a3,
     author = {V. V. Arestov and M. A. Filatova},
     title = {On the approximation of the differentiation operator by linear bounded operators on the class of twice differentiable functions in the space $L_2(0,\infty)$},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {35--50},
     year = {2012},
     volume = {18},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2012_18_4_a3/}
}