@article{10_4064_sm227_1_1,
     author = {Yoshihiro Mizuta and Ale\v{s} Nekvinda and Tetsu Shimomura},
     title = {Optimal estimates for the fractional {Hardy} operator},
     journal = {Studia Mathematica},
     pages = {1--19},
     year = {2015},
     volume = {227},
     number = {1},
     doi = {10.4064/sm227-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm227-1-1/}
}