Day, A.M. (1991) The Parallel Implementation of a 3D Convex Hull Algorithm. Computer-Aided Design, 23 (3). pp. 177-188.
Glauert, J. R. W., Kennaway, J. R. and Sleep, M. R. (1991) Dactl - an Experimental Graph Rewriting Language. In: Graph Grammars and Their Application to Computer Science. Lecture Notes in Computer Science, 532 . Springer, pp. 378-395.