@article{VMJ_2018_20_4_a0,
     author = {Kh. Kh. Burchaev and G. Yu. Ryabykh},
     title = {Properties of extremal elements in the duality relation for {Hardy} spaces},
     journal = {Vladikavkazskij matemati\v{c}eskij \v{z}urnal},
     pages = {5--19},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMJ_2018_20_4_a0/}
}