1. Nasopalatine cysts;Abrams;Oral Surg.,1963
2. Persisting bilateral nasopalatine ducts;Allard;Oral Surg.,1982
3. Observations on the incisive canaculi and nasopalatine ducts;Bellous;Br. Dent. J.,1951
4. Palatal opening of nasopalatine duct;Buchner;Oral Surg.,1972
5. Nasopalatine duct structures and peculiar bony pattern observed in anterior maxillary region;Burket;Arch. Path.,1937