@article{NSJOM_2009_39_2a_11,
     author = {X. Ge and J. Li},
     title = {Some remarks on $sn$-metrizable

 spaces},
     journal = {Novi Sad Journal of Mathematics},
     pages = {103-109},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {2009},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2009_39_2a_11/}
}