@article{TRSPY_1987_180_a111,
     author = {R. A. Raitsin},
     title = {On the best mean-square approximation, by polynomials and entire functions of exponential type, to functions with a~logarithmic singular point},
     journal = {Informatics and Automation},
     pages = {185--186},
     publisher = {mathdoc},
     volume = {180},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a111/}
}