6. A preliminary assessment of potential for using Caesium-137 to estimate rates of soil erosion in the Loess Plateau of China, Hydrological Science,1990,35,3,243-252.
7. A comparison of earth flow movement mechanisms on forested and grassed slopes, Raukumara Peninsula, North Island, New Zealand. Geomorphology, 6(1993) 175-187
8. Soil erosion rates on sloping cultivated land on the Loess Plateau near Ansai, Shaanxi Province, China: An investigation using 137Cs and rill measurements. Hydro. Processes 12 (1998), 171-189