1. Adsorptive bubble separation techniques;Lemlich,1972
2. Ion flotation;Sebba,1962
3. Flotation of algae, bacteria and other microorganisms;Smith;Mineral Processing and Extractive Metallurgy Review,1989
4. Flotation in water treatment;Zabel,1992
5. Flotation applied to effluent treatment;Rubio,1998