@article{IM2_1985_25_1_a5,
     author = {A. P. Mul},
     title = {Necessary and sufficient conditions for the existence of boundary values of the modulus of a~function that is bounded and analytic in a~half-plane},
     journal = {Izvestiya. Mathematics },
     pages = {89--114},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1985_25_1_a5/}
}