W. Qamar, S. Qadir, H. Bilal, and A. ., “Frequency of Naturally Occurring Maxillary Midline Diastema (mmd) and its Association with Enlarged Labial Frenulum in Students of Public Medical College Mardan, Pakistan”, J Gandhara Med Dent Sci, vol. 5, no. 1, pp. 14–17, Sep. 2018.