1. The Construction of Gothic Cathedrals;Fitchen,1961
2. Bau-Constructions-Lehre, vol. 1: Constructionen in Stein;Breymann,1849
3. J. Guadet, Éléments et Théorie de l'Architecture. 4 vols. Paris (n.d.).
4. The functional aspect of the Gothic style;Rosenberg;Jl R. Inst. Br. Archit,1936