@article{EXMATH_2008_2008_1_a9,
     author = {Castillo, J. M. F. and  Sim\~oes, M. A.},
     title = {Limits and the {Ext} functor. },
     journal = {Extracta mathematicae},
     pages = {119-130},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_2008_2008_1_a9/}
}