1. "Laser Welded Channel Wall Nozzle Design, Manufacturing and Hot Gas testing" A. Boman, J. Häggander, AIAA 99-2750
2. "Laser Welded Sandwich Manufacturing Technology for Nozzle Extensions", M Hallberg and T Stenholm, AIAA-01-3255
3. "Functional Aspects of Laser Welded Sandwich Walls for Rocket Engine Nozzles", L Winterfeldt and E Stenström, AIAA-01-3695
4. "Partnership and concept design, a way to the efficientproduct", J. Häggander, AIAA-99-2603