* {{en}}cita [web|http://www.engg.ksu.edu/HSRC/98Proceed/28Mead/28mead.pdf|"A comparison of packed-column and low-profile sieve tray air strippers"]|lingua=en}}
* {{en}}cita [web|http://www.unb.ca/che/Undergrad/lab/hydraulics.pdf|"Hydraulics of a Packed Column"]|lingua=en}}