Scott (1987), 15.1.1, p. 441. - Scott, W. R. (1987), "15.1 FC groups", Group Theory, Dover, pp. 441–446 ↩
Scott (1987), 15.1.2, p. 441. - Scott, W. R. (1987), "15.1 FC groups", Group Theory, Dover, pp. 441–446 ↩