1. T.Graham: Phil. Trans. Roy. Soc. (London) 156, 399 (1866)
2. T. Graham: Proc. Roy. Soc. (London) 16, 422 (1868); Phil. Mag. 36, 63 (1868), C. R. Acad. Sci. 66. 1014 (1868); Ann. Chim. Phys. (Paris) 14, 315 (1868)
3. T. Graham: Proc. Roy. Soc. (London) 17, 212, 500 (1869); C. R. Acad. Sci. 68,101, 1511 (1869); Ann. Chim. Phys. (Paris) 16, 188 (1869); Ann. Chem. Pharm. 150,353; 152, 168 (1869)
4. T. B. Flanagan: Technical Bulletin Engelhard Industries, Inc. VII, 9 (1966)
5. Topics in Applied Physics,1978