1. Development of the human dentition: an atlas;van der Linden,1976
2. The frequency of malposed unerupted lower premolar teeth;Stemm;Angle Orthod,1971
3. Diagnosis and treatment planning for unerupted premolars;Burch;Pediatr Dent,1994
4. Eruption of mandibular second premolar;Harary;J Pedod,1983
5. Unerupted and ectopic mandibular premolars;Loh;Oral Surg Oral Med Oral Pathol,1986