@article{10_1007_s10492_010_0024_6,
     author = {Triacca, Umberto and Volodin, Andrei},
     title = {On a characterization of orthogonality with respect to particular sequences of random variables in $L^2$},
     journal = {Applications of Mathematics},
     pages = {329--335},
     publisher = {mathdoc},
     volume = {55},
     number = {4},
     year = {2010},
     doi = {10.1007/s10492-010-0024-6},
     mrnumber = {2737940},
     zbl = {1224.60053},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-010-0024-6/}
}