@article{05727008, title = {An alternative proof of the ultralimits theorem.}, journal = {Revista Colombiana de Matem\'aticas}, volume = {43}, year = {2009}, pages = {115-138}, zbl = {1214.03022}, language = {en}, url = {http://dml.mathdoc.fr/item/05727008} }
Forero Cuervo, Andrés. An alternative proof of the ultralimits theorem.. Revista Colombiana de Matemáticas, Tome 43 (2009) pp. 115-138. http://gdmltest.u-ga.fr/item/05727008/