1. CEN EC1 (English): “Eurocode 1: Actions on structures—Part 1-1: general actions—Densities, self-weight, imposed loads for buildings” EN 1991-1-1, Comite Europeen de Normalization, Brussels, Belgium; 2002.
2. CEN EC8: Eurocode 8—Design provisions for earthquake resistant structures, EN-1998-1:2004: E, Comite Europeen de Normalization, Brussels, Belgium; 2004.
3. CEN EC0 (English): “Eurocode—Basis of structural design” EN 1990:2002, Comite Europeen de Normalization, Brussels, Belgium; 2002.
4. Hugo V. Notre Dame de Paris. Paris: Hetzel; 1831.
5. Ruskin J. The seven lamps of architecture. London: Ward, Lock; 1911.