http://bcis.pacificu.edu/~polverone/chromatography/1953-02-body.html (http://bcis.pacificu.edu/~polverone/chromatography/1953-02-body.html)
https://www.thevespiary.org/rhodium/Rhodium/chemistry/equipment/flash.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/equipment/flash.html)
https://www.thevespiary.org/rhodium/Rhodium/pdf/flash.chromatography.pdf (https://www.thevespiary.org/rhodium/Rhodium/pdf/flash.chromatography.pdf)