@article{TRSPY_1978_130_a1,
     author = {V. I. Vasyunin},
     title = {Unconditionally convergent spectral decompositions and interpolation problems},
     journal = {Informatics and Automation},
     pages = {5--49},
     publisher = {mathdoc},
     volume = {130},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1978_130_a1/}
}