@article{ZNSL_1974_39_a12,
     author = {S. A. Avdonin},
     title = {On {Riesz} bases of exponential functions in~$L^2$},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {176--177},
     publisher = {mathdoc},
     volume = {39},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1974_39_a12/}
}