Pala, H. G., Artunç-Ülkümen, B., Koyuncu, F. M., Uyar, Y., & Bülbül-Baytur, Y. (2015). Normal ranges of biorbital and interorbital distances in healthy Turkish pregnancies at 19–23 weeks of gestation and correlation with craniofacial structures. J Turk Ger Gynecol Assoc.

Pala, Halil Gürsoy, Burcu Artunç-Ülkümen, Faik Mümtaz Koyuncu, Yıldız Uyar, و Yeşim Bülbül-Baytur. "Normal Ranges of Biorbital and Interorbital Distances in Healthy Turkish Pregnancies At 19–23 Weeks of Gestation and Correlation With Craniofacial Structures." J Turk Ger Gynecol Assoc 2015.

Pala, Halil Gürsoy, et al. "Normal Ranges of Biorbital and Interorbital Distances in Healthy Turkish Pregnancies At 19–23 Weeks of Gestation and Correlation With Craniofacial Structures." J Turk Ger Gynecol Assoc 2015.