1. The frequency spectrum of topological spaces and the classification of spaces;Arhangel'skiı̌;Sov. Math. Dokl.,1972
2. The frequency spectrum of a topological space and the product operations;Arhangel'skiı̌;Trans. Mosc. Math. Soc.,1981
3. Classes of topological groups;Arhangel'skiı̌;Russ. Math. Surv.,1981
4. The diagonal of a first countable paratopological group, submetrizability, and related results;Arhangel'skiı̌;Appl. Gen. Topol.,2007
5. The rank of the diagonal and submetrizability;Arhangel'skiı̌;Comment. Math. Univ. Carol.,2006