Seah, M P; Qiu, J H*; Cumpson, P J; Castle, J E* (1994) Simple method of depth profiling (stratifying) contamination layers,illustrated by studies on stainless steel. Surf. Interface Anal., 21. 336 -341

Seah, M P; Qiu, J H*; Cumpson, P J; Castle, J E* (1994) Stability of reference masses II: the effect of environment and cleaning methods on the surfaces of stainless steel and allied materials. Metrologia, 31. 93 - 108

Seah, M P; Qiu, J H*; Cumpson, P J; Castle, J E* (1994) A simple method of depth profiling (stratifying) contamination layers illustrated by studies on stainless steel. Surf. Interface Anal., 21. pp. 336-341.

Seah, M P; Qiu, J H*; Cumpson, P J; Castle, J E* (1993) Stability of reference masses II: the effect of environment and cleaning methods on the surfaces of stainless steel and allied materials. NPL Report. DMM(A)95