1. A study of apexification without a catalyst paste;Chawla;J Dent Child,1980
2. Inducing root end closure of nonvital permanent teeth;Steiner;J Dent Child,1968
3. The management of the nonvital anterior tooth with an open apex;Bradley;J Br Endodon Soc,1977
4. Management of the open (immature) apex, 2. Nonvital teeth;Gutmann;Int Endodon J,1981
5. Traumatic injuries of the teeth. Chap. 10;Andreason,1971