@article{MZM_1973_13_5_a14,
     author = {V. M. Badkov},
     title = {Boundedness in the mean of orthonormalized polynomials},
     journal = {Matemati\v{c}eskie zametki},
     pages = {759--770},
     year = {1973},
     volume = {13},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1973_13_5_a14/}
}