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von Arx, T; Salvi, Giovanni E (2008). Incision techniques and flap designs for apical surgery in the anterior maxilla. European journal of esthetic dentistry - english edition, 3(2), pp. 110-126. Berlin: Quintessence Verlags-GmbH
von Arx, Thomas; Salvi, Giovanni E; Janner, Simone; Jensen, Simon S (2009). Gingival recession following apical surgery in the esthetic zone: a clinical study with 70 cases. European journal of esthetic dentistry - english edition, 4(1), pp. 28-45. Berlin: Quintessence Verlags-GmbH
