@article{VMP_2006_7_4_a3,
     author = {A. V. Bayev},
     title = {The {Lagrange} principle and finite-dimensional approximations in the optimal inverse problem for linear operators},
     journal = {Numerical methods and programming},
     pages = {323--336},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMP_2006_7_4_a3/}
}