@article{10_4064_sm_116_1_49_57,
     author = {Stevo Todor\v{c}evi\'c},
     title = {The functor {\ensuremath{\sigma}{\texttwosuperior}X}},
     journal = {Studia Mathematica},
     pages = {49--57},
     publisher = {mathdoc},
     volume = {116},
     number = {1},
     year = {1995},
     doi = {10.4064/sm-116-1-49-57},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-116-1-49-57/}
}