1. One Use of the Arnold Coil Spring;Arnold;Int. J. Orthodontia,1931
2. Coil Springs as an Application of Force;Arnold;Int. J. Orthodontia,1934
3. A Study of Applied Force as Related to the Use of Elastics and Coil Springs;Bell;Angle Orthodontists,1951
4. Correcting Irregularities by the Spring of Gold Bands;Byrnes,1886