@article{10_4064_sm154_1_3,
     author = {H\"usamett{\i}n \c{C}o\c{s}kun and Celal \c{C}akan and  Mursaleen},
     title = {On the statistical and $\sigma $-cores},
     journal = {Studia Mathematica},
     pages = {29--35},
     publisher = {mathdoc},
     volume = {154},
     number = {1},
     year = {2003},
     doi = {10.4064/sm154-1-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm154-1-3/}
}