@article{PA_2008_15_a3,
     author = {I. Naraniecka},
     title = {The {Sharp} upper bound for $\mathfrak{R}(A_{3}-\lambda A_{2})$ in $U'_{\alpha}$},
     journal = {Problemy analiza},
     pages = {17--23},
     publisher = {mathdoc},
     number = {15},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PA_2008_15_a3/}
}