@article{EXMATH_1990_1990_1_a5,
     author = {Gonz\'alez, Manuel and Martin\'on, Antonio},
     title = {Extensiones del functor de {Sadovskii.}},
     journal = {Extracta mathematicae},
     pages = {15-17},
     year = {1990},
     volume = {5},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1990_1990_1_a5/}
}