@article{SM_1974_23_4_a0,
     author = {V. S. Vladimirov},
     title = {Holomorphic functions with positive imaginary part in the future {tube.~II}},
     journal = {Sbornik. Mathematics},
     pages = {467--482},
     publisher = {mathdoc},
     volume = {23},
     number = {4},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1974_23_4_a0/}
}