Jüri Martna
- Tunnelling in a complex rock mass: Experience from Vietas, Swedish Lapland. Dans: Tunnelling and Underground Space Technology, v. 3, n. 3 ( 1988). (1988):
- Underground hydropower projects in Sweden. Dans: Tunnelling and Underground Space Technology, v. 4, n. 2 ( 1989). (1989):
- A new automatic probe for measuring triaxial rock stresses in deep bore holes. Dans: Tunnelling and Underground Space Technology, v. 5, n. 1-2 (janvier 1990). (1990):