@article{PA_2023_12_3_a4,
     author = {S. Yu. Graf and I. A. Nikitin},
     title = {Planar harmonic mappings with a given {Jacobian}},
     journal = {Problemy analiza},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {2023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PA_2023_12_3_a4/}
}