1. Seymour KG, Samarawickrama DY, Lynch EJ. Metal ceramic crowns â€' a review of tooth preparation. Eur J Prosthodont Restor Dent. 1999;7:79-84.
2. Jorgensen KD. The relationship between retention and convergence angle in cemented veneer crowns. Acta Odonto/Scand. 1955;13:35-40.
3. Massironi D, Paschetta R, Romeo D. Accuracy and aesthetics. Clinical and dental engineering stages of dental prosthesis. M.: ABC; 2008.
4. Fradeani M. Analysis of aesthetics. Systematic approach to orthopedic treatment. Vol. 1. Aesthetic rehabilitation with non-removable dental prostheses. M.: The ABC of the Dentist; 2007.
5. Nelson JA, Vlazny AL. Axial wall parallel development method. Quintessence Int Dent Dig. 1983;14(7):719-723.