1. Etiology, Pathological Significance and Treatment of Impacted and Unerupted Teeth;Lyons;Dent. Cosmos,1921
2. Third Molar in the Evolution of the Jaw;Levine;Dent. Cosmos,1917
3. Clinical Pathology of Non-Erupted Mandibular Third Molars Including a Bacteriological Study of the Involved Dental Pulp;Ito;Dent. Cosmos,1929
4. Pathological Significance of Impacted and Unerupted Teeth;Lyons;J.N.D.A,1916
5. Dental Impactions and Their Sequelae;Tholen;J. A. M. A,1923