@article{IM2_2004_68_5_a6,
     author = {A. Yu. Popov},
     title = {On the completeness of sparse subsequences of systems of functions of the form $f^{(n)}(\lambda_nz)$},
     journal = {Izvestiya. Mathematics},
     pages = {1025--1049},
     year = {2004},
     volume = {68},
     number = {5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2004_68_5_a6/}
}