@article{PA_2004_11_a7,
     author = {Z. J. Jakubowski and A. {\L}azi\'nska},
     title = {On some harmonic functions related to holomorphic functions with a positive real part},
     journal = {Problemy analiza},
     pages = {61--70},
     year = {2004},
     number = {11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PA_2004_11_a7/}
}