Graph theoretical clustering based on limited neighbourhood sets. - Roderick Urquhart (Pattern Recognit., 1982)

Some properties of the planar Euclidean relative neighbourhood graph. - Roderick Urquhart (Pattern Recognit. Lett., 1983)

The equal-angle spanning tree mapping: A sequential method for projecting from h-space to 2-space. - Dakai Wang; Roderick Urquhart; James E. S. Macleod (Pattern Recognit. Lett., 1983)