@article{DAN_1973_209_2_a0,
     author = {G. P. Amirdzhanov},
     title = {Density, {Souslin} number, and tightness of topological spaces},
     journal = {Doklady Akademii Nauk},
     pages = {265--268},
     publisher = {mathdoc},
     volume = {209},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_209_2_a0/}
}