1. Emiel AM, Hegazy SA (2010) Modified Rotation Joint Connection Unite Versus Double Aker Clasp used for Bracing of Maxillary unilateral Free End Removable Partial Dentures (In Vitro Analysis of Stresses on Principle Abutments and Edentulous Ridge). J Am Sci 6(9): 109-114.
2. Burns DR, Ward JE (1990) A Review of attachments for Removable Partial Denture Design: Part 1. Classification and selection. Int J Prosth 3(1): 98-102.
3. Burns DR, Ward JE. A Review of attachments for Removable Partial Denture Design: Part 2. Treatment planning and attachment selection. Int J Prosthodont 1990; 3:169-74.
4. The nature of partial denture foundation; suggestion for its preservation;De Van;J Prosthet Dent 2(2),1952
5. Monteith BD (1984) Management of loading forces on mandibular distal extension prostheses. Part 1: evaluation of concepts for design. J Prosthet Dent 52(5): 673-681.