1. Acare (2020) ACARE flightpath 2050 – Europe’s vision for aviation. Council for Aviation Research and Innovation in Europe, Advisory
2. Al-Ashaab A, Golob M, Attia UM, Khan M, Parsons J, Andino A, Perez A, Guzman P, Onecha A, Kesavamoorthy S, Martinez G, Shehab E, Berkes A, Haque B, Soril M, Sopelana A (2013) The transformation of product development process into lean environment using set-based concurrent engineering: a case study from an aerospace industry. Concurr Eng 21(4):268–285
3. Alexander C (1977) A pattern language: towns, buildings, construction. Oxford university press
4. Andreasen MM (1980) Machine design methods based on a systemic approach. PhD Thesis, Lund University (in Danish)
5. Andreasen MM, Hein L (2000) Integrated product development. IPU, Institute for Product Development, Technical University of Denmark, Lyngby/Copenhagen