@article{AFM_2008_33_2_a13,
     author = {H\r{a}kan Hedenmalm},
     title = {Planar {Beurling} transform and {Grunsky} inequalities},
     journal = {Annales Fennici Mathematici},
     pages = {585--596},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2008_33_2_a13/}
}