1. Important prenatal factors that influence the development of the facial area, and cause malrelation of dental arch at birth;Weinberger;Dental Items Interest,1916
2. A study of some etiological factors of malocclusion;Hellman;Dental Cosmos,1914
3. A preliminary study of the morphology of the upper gum pad at the age of 6 months;Leighton;Swed Dent J Suppl,1982
4. Changes of palatal and alveolar arch form during predental period in infants;Nagaishi;Jpn J Ped Dent,2011
5. Study on the predental arch at 6 months old infants;Takekoshi;Kanagawashigaku,1997