1. A review of the properties of expanded graphite and selected forms of PTFE as alternatives to asbestos in a sealing role;Staaf,1978
2. Packing material alternatives: Part 2: measurements of physical properties;Flitney;BHRA Rep. RR 1772,1981
3. New generation packings;Bayliss;Pumps,1981
4. Halligan B.D. Compression packings. James Walker.
5. Anon 1503069 End Suction centrifugal pumps. Dimensions for cavities for mechanical seals and soft packings.