1. The NGI 54 mm sampler for undisturbed sampling of clays and representative sampling of coarser materials;Andresen,1979
2. Outline on collection and simple working instruments for marine sediments;Bezrukov;Tr. Inst. Okeanol. Akad. Nauk, USSR,1960
3. The development of the Bedford institute deep-sea drill;Brooke;Deep-Sea Res.,1968
4. An experimental study of skin friction around piles in clay;Chandler;Gèotechnique,1982
5. The plugging behaviour of driven and jacked piles in sand;de Nicola;Geotechnique,1997