K. . Ali, S. S. . Ameen, M. A. . Mehboob, M. K. . Saeed, and Khalid, “Comparison of Intraocular Pressure Measurement by Goldmann Applanation Tonometry and Pneumotonometry in Healthy Subjects and Patients with Primary Open Angle Glaucoma”, J. Bahria Univ. Med. Dent. Coll., vol. 6, no. 4, pp. 209–212, Sep. 2016.