@article{10_4064_sm200211_8_9,
     author = {Tomasz Kiwerski and Pawe{\l} Kolwicz and Lech Maligranda},
     title = {Isomorphic and isometric structure of the optimal domains for {Hardy-type} operators},
     journal = {Studia Mathematica},
     pages = {45--89},
     year = {2021},
     volume = {260},
     number = {1},
     doi = {10.4064/sm200211-8-9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm200211-8-9/}
}