@article{01400165,
title = {Characterization of dual extensions in the category of Banach spaces.},
journal = {Divulgaciones Matem\'aticas},
volume = {7},
year = {1999},
pages = {133-142},
zbl = {0944.46062},
language = {en},
url = {http://dml.mathdoc.fr/item/01400165}
}
Pulgarín, Antonio A. Characterization of dual extensions in the category of Banach spaces.. Divulgaciones Matemáticas, Tome 7 (1999) pp. 133-142. http://gdmltest.u-ga.fr/item/01400165/