1. Secundaire retentie van melkmolaren;Raghoebar;Ned Tijdschr Tandheelkd,1988
2. Tooth ankylosis;Biederman;Ann Dent,1953
3. Report of a case of a submerging first molar;Sterrett;Am J Orthod Oral Surg,1940
4. Reimpaction of a first permanent maxillary molar due to an obscure idiopathic etiology;Dayan;Clin Prev Dent,1983
5. Die Halbretention des ersten Molaren;Korkhaus;Dtsch Zahnärtzl Z,1952