A study of fundamental graphics software. - R. J. Botting (1970)

"Integer Circles, Etc." - three move extension of Bresenham's algorithm. - Michael L. V. Pitteway; R. J. Botting (Comput. Graph. Image Process., 1974)

Efficient Storage for Amorphous Data. - R. J. Botting (Softw. Pract. Exp., 1977)