1. Essays on the Surgery Qf the Temporal Bone;C, Ballance,1919
2. vol. 2, p. 578.
3. Cited from Ballance and Duel;Macmillan, London,1932
4. Operative treatment of chronic facial palsy of peripheral origin;Ballance, C.A.; Ballance, H.A.; Stewart, P.;Brit. med. J,1903
5. The operative treatment of facial palsy;Ballance, C.; Duel, A.B.;Arch. Otolaryng,1932