@article{IVM_2002_2_a8,
     author = {M. Yu. Kokurin and N. A. Yusupova},
     title = {On necessary and sufficient conditions for the slow convergence of methods for solving linear ill-posed problems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {81--84},
     publisher = {mathdoc},
     number = {2},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2002_2_a8/}
}