@article{10_2298_FIL2215003N,
     author = {H K Nigam and Manoj Kumar Sah},
     title = {Characterizations of double {Hausdorff} matrices and best approximation of conjugate of a function in generalized {H\"older} space},
     journal = {Filomat},
     pages = {5003 },
     year = {2022},
     volume = {36},
     number = {15},
     doi = {10.2298/FIL2215003N},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/FIL2215003N/}
}