1. Breuer F (2010) Reflexive grounded theory. An introduction into practice of research [Reflexive Grounded Theory. Eine Einführung in die Forschungspraxis]. VS Verlag für Sozialwissenschaften, Wiesbaden
2. CEN (2004) EN 1995-1-1: Eurocode 5: design of timber structures—part 1-1: general—common rules and rules for buildings. European Committee for Standardization, Brussels
3. Destatis—Federal Statistical Office (2015a) Building Activity and Dwellings. Building Activity, Technical series 5 series 1 [Bautätigkeit und Wohnungen. Bautätigkeit, Fachserie 5 Reihe 1] – 2014, 26th. August 2015. Wiesbaden
4. Destatis—Federal Statistical Office (2015b) Building and Housing. Construction Work Completed of Residential and Non-residential Buildings (new construction) According to the Primarily Used Building Material [Bauen und Wohnen. Baufertigstellungen von Wohn- und Nichtwohngebäuden (Neubau) nach überwiegend verwendetem Baustoff] – 2014. 08.14.2015. Wiesbaden
5. Dias A, Ferreira M, Jorge L (2011) Timber–concrete practical applications–bridge case study. Proc Inst Civ Eng Struct Build 164(2):130–140