1. The flow of fine dense solids down a vertical standpipe;Judd;AIChE Ann. Conf.,1976
2. The properties of fluidized solids in vertical downflow;Kojabashian;MSc. Thesis,1954
3. Coexistence of fluidized solids flow and packed bed flow in standpipes;Leung,1978
4. Cocurrent downflow of suspension in standpipes;Leung,1976