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von Arx, T; Vinzens-Majaniemi, T; Bürgin, W; Jensen, S S (2007). Changes of periodontal parameters following apical surgery: a prospective clinical study of three incision techniques. International endodontic journal, 40(12), pp. 959-69. Chichester: Wiley-Blackwell 10.1111/j.1365-2591.2007.01306.x
