Geodesic
О весе нигде не плотных подмножеств
Problemy analiza, no. 12 (2005), pp. 12-16.

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In this paper we study the $nd$-weight of topological spaces. The relations between $nd$-weight, weight, density and cellularity are studied. The estimates for the $nd$-weight of the sum and the product of topological spaces are adduced. The problem of $nd$-weight increase at mappings is analysed, including the case of compact spaces. 
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     author = {M. A. Kononova},
     title = {{\CYRO} {\cyrv}{\cyre}{\cyrs}{\cyre} {\cyrn}{\cyri}{\cyrg}{\cyrd}{\cyre} {\cyrn}{\cyre} {\cyrp}{\cyrl}{\cyro}{\cyrt}{\cyrn}{\cyrery}{\cyrh} {\cyrp}{\cyro}{\cyrd}{\cyrm}{\cyrn}{\cyro}{\cyrzh}{\cyre}{\cyrs}{\cyrt}{\cyrv}},
     journal = {Problemy analiza},
     pages = {12--16},
     publisher = {mathdoc},
     number = {12},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PA_2005_12_a1/}
}
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M. A. Kononova. О весе нигде не плотных подмножеств. Problemy analiza, no. 12 (2005), pp. 12-16. http://geodesic.mathdoc.fr/item/PA_2005_12_a1/