Stefan Karlsson
- Holmestrand, Norway: the world's first high-speed-rail station under rock. In: Proceedings of the Institution of Civil Engineers - Civil Engineering, v. 171, n. 5 (May 2018). (2018):
- 22.03: Acoustic ceiling designed for trains passing at 250km/h: Holmestrand - The first station in the world inside a mountain entrance hall. In: ce/papers, v. 1, n. 2-3 (September 2017). (2017):