1. BEGEMAN H. K. (1966): A new approach for taking a continuous soil sample. Laboratorium voor Grondmechanica, paper no 4.
2. BRUNSDEN D.—JONES D. K. C. (1972): The morphology of degraded landslide slopes in South-West Dorset. Qrtly. Jnl. Eng. Geology, 5, 205–222.
3. BRUNSDEN D.—DOORNKAMP J. C.—FOOKES P. G.—JONES D. K. C.—KELLY J. M. H. (1975): Geomorphological mapping techniques in highway engineering. Jnl. Instn. Highway Engineers, 35–41.
4. BURLAND J. B.—BROMS B. B.—de MELLO V. F. B. (1977): Behaviour of foundations and structures. State-of-the-Art report. Proc 9th Int. Conf. Soil Mech. & Found Engg, Tokyo, 2, 495–546.
5. CHANDLER R. J. (1969): The effect of weathering on the shear strength properties of Keuper Marl. Geotechnique, 19, 321–336.