@article{RCM_2018_52_2_a0,
     author = {Juan Carlos Mart{\'\i}nez},
     title = {A direct proof of a theorem of {Jech} and {Shelah} on {PCF} algebras},
     journal = {Revista colombiana de matematicas},
     pages = {131--137},
     publisher = {mathdoc},
     volume = {52},
     number = {2},
     year = {2018},
     url = {http://geodesic.mathdoc.fr/item/RCM_2018_52_2_a0/}
}