@article{ZNSL_1980_102_a12,
     author = {M. N. Yakovlev},
     title = {Estimates of the solutions systems of linear algebraic equations and its applications to investigation of convergence
},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {174--180},
     publisher = {mathdoc},
     volume = {102},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1980_102_a12/}
}