V. O. Krichke
- The OSP-1 portable pile refusal meter. In: Soil Mechanics and Foundation Engineering, v. 23, n. 3 (May 1986). (1986):
- Device for control of pile driving verticality. In: Soil Mechanics and Foundation Engineering, v. 24, n. 2 (March 1987). (1987):
- The IPB-1 strength tester for concrete in driven piles. In: Soil Mechanics and Foundation Engineering, v. 27, n. 1 (January 1990). (1990):