@article{SM_1972_18_3_a3,
     author = {V. V. Fedorchuk},
     title = {On $H$-closed extensions of $\theta$-proximity spaces},
     journal = {Sbornik. Mathematics},
     pages = {407--424},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1972_18_3_a3/}
}