@article{IM2_1993_40_3_a5,
     author = {V. I. Ryazanov},
     title = {On strengthening {K.~Strebel's} convergence theorem},
     journal = {Izvestiya. Mathematics },
     pages = {591--606},
     publisher = {mathdoc},
     volume = {40},
     number = {3},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1993_40_3_a5/}
}