@article{10_4064_sm_91_2_89_107,
     author = {I. Szalay},
     title = {On the strong {Ces\`aro} summability of double orthogonal series},
     journal = {Studia Mathematica},
     pages = {89--107},
     publisher = {mathdoc},
     volume = {91},
     number = {2},
     year = {1988},
     doi = {10.4064/sm-91-2-89-107},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-91-2-89-107/}
}