1. Root amputation and tooth hemisection;Basaraba;Dent. Clin. N. Amer.,1969
2. Frank, A. L.: Endodontic endosseous implants and treatment of the wide-open apex. Dent. Clin. N. Amer., November, 1967, p. 675.
3. Periodontal Therapy;Goldman,1964
4. Endodontics;Ingle,1965
5. Langeland, K.: The hisopathologic basis in endodontic treatment. Dent. Clin. N. Amer., November, 1967, p. 512.