Ochan topologies on the space of closed subgroups
English version (Springer): Ukrainian Mathematical Journal 41 (1989), no. 10, pp 1150-1154.
Citation Example: Protasov I. V., Stukotilov V. S. Ochan topologies on the space of closed subgroups // Ukr. Mat. Zh. - 1989. - 41, № 10. - pp. 1337–1342.
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