1. Bratby, J.; Coagulation and Flocculation, pp. 54–91, Uplands Press Ltd., Croydon CR 9 1 LB, UK (1980)
2. The foam separation of colloidal ferric oxide with an anionic and a cationic surfactant
3. Haikibutsu Kenkyu Zaidan ed.; Saishushobunjyo ni okeru Kankyou Osenbushitsu Taisaku ni kansuru Kenkyuhokokusho, pp. 138–194, Zaidanhojin Haikibutsu Kenkyuzaidan, Tokyo, Japan (1999)
4. Hunter, R. J.; Foundations of Colloid Science I, pp. 564–625, Clarendon Press, Oxford, UK (1980)
5. Studies of the Removal of Dye Ions by Adsorbing Particle Flotation