@article{NSJOM_2007_37_1a_5,
     author = {X. Ge and J. Shen and G. Ying},
     title = {Spaces with

 $\sigma$-weakly hereditarily closure-preserving $sn$-networks},
     journal = {Novi Sad Journal of Mathematics},
     pages = {33-37},
     publisher = {mathdoc},
     volume = {37},
     number = {1},
     year = {2007},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2007_37_1a_5/}
}