Geodesic
Characterizations of spaces with $\sigma$-locally countable $sn$-networks
Sibirskie èlektronnye matematičeskie izvestiâ, Tome 7 (2010), pp. 480-486.

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The concept of a $\sigma$-locally countable mapping is used for establishing relations between metric spaces and spaces with $\sigma$-locally countable $sn$-networks ($cs^*$-networks, weak bases).
Keywords: $cs^*$-network, $sn$-network, weak base, $\sigma$-locally countable mapping, sequence-covering mapping. 
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Sh. Xia. Characterizations of spaces with $\sigma$-locally countable $sn$-networks. Sibirskie èlektronnye matematičeskie izvestiâ, Tome 7 (2010), pp. 480-486. http://geodesic.mathdoc.fr/item/SEMR_2010_7_a33/

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