Ilkka Vähäaho
- Sustainability issues for underground space in urban areas. In: Proceedings of the Institution of Civil Engineers - Urban Design and Planning, v. 165, n. 4 (Dezember 2012). (2012):
- From geotechnical maps to three-dimensional models. In: Tunnelling and Underground Space Technology, v. 13, n. 1 (Januar 1998). (1998):
- introduction to the development for urban underground space in Helsinki. In: Tunnelling and Underground Space Technology, v. 55 (Mai 2016). (2016):