1. Abatangelo, L.M.: Una caratterizzazione gruppale delle curve hermitiane. Matematiche 39, 101–110 (1984)
2. Assmus, E.F. Jr., Key, J.D.: Designs and Their Codes. Cambridge University Press, Cambridge (1992)
3. Springer Monographs in Mathematics;S.G. Barwick,2008
4. Bruen, A.A., Forcinito, M.A.: Cryptography, Information Theory and Error-Correction. Wiley-Interscience, New York (2006)
5. Casse, L.R.A., O’Keefe, C.M., Penttila, T.: Characterizations of Buekenhout–Metz unitals. Geom. Dedic. 59, 29–42 (1996)