@article{TRSPY_1967_93_a12,
     author = {Phan {\DJ}{\`\i}ni Di\^eu},
     title = {On closed and open sets in constructive topological spaces},
     journal = {Informatics and Automation},
     pages = {250--256},
     publisher = {mathdoc},
     volume = {93},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1967_93_a12/}
}