Mushtaq, Iram, and Arshad Malik. “EVALUATION OF THE OCHSENBEIN-LUEBKE FLAP TECHNIQUE IN PERIAPICAL SURGERY AT PUNJAB DENTAL HOSPITAL LAHORE PAKISTAN”. Journal of Ayub Medical College Abbottabad, vol. 15, no. 3, Oct. 2003, https://www.jamc.ayubmed.edu.pk/index.php/jamc/article/view/3979.