@article{PA_2006_13_a8,
     author = {Z. J. Jakubowski and A. {\L}azi\'nska},
     title = {On some classes of harmonic functions with conditions imposed on coefficients and their arguments},
     journal = {Problemy analiza},
     pages = {95--111},
     publisher = {mathdoc},
     number = {13},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PA_2006_13_a8/}
}