1. Countercurrent extraction of benzoic acid between toluene and water: Performance of spray and packed columns;Appel F. J.;Industrial and Engineering Chemistry,1937
2. The effect of packing size and column diameter on mass transfer in liquid–liquid extraction;Leibson I.;Chemical Engineering Progress,1953
3. Part 1. Flooding rates for packed columns;Dell F. R.;Transactions of the Institution of Chemical Engineers,1951
4. Liquid–liquid extraction. Part 1. Flooding rates for packed columns. Addendum;Dell F. R.;Transactions of the Institution of Chemical Engineers,1951