1. Hirobe, T., W. Ogawa and S. Kubo, Electrician 78 (1917) 656. The earlier work of A. Macfarlane: Phil. Mag. 10 (1880) 389, is cited by W. Franz, Encyclopedia of physics XVII (1956) 159, Springer-Verlag Berlin, Göttingen, Heidelberg.
2. Kok, J. A., Electrical breakdown of insulating liquids, Philips Technical Library, 1961. German translation: Der elektrische Durchschlag in flüssigen Isolierstoffen, Philips technische Bibliothek, 1963. French translation: Rigidité diélectrique des liquides isolants, Bibliothèque technique Philips, 1964.
3. Crowe, R. W., H. Sharbaugh and J. K. Bragg, J. Appl. Phys. 24 (1953) 814; 25 (1954) 382, 392, 1480; 26 (1955) 434.
4. Kok, J. A. and M. M. G. Corbey, Appl. Sci. Res. B 4 (1957) 285.
5. Cottrell, F. G. and W. A. Schmidt, J. Franklin Inst. 174 (1912) 293; W. W. Strong, Ann. Phys. Lpz. 48 (1915) 251.