Brown, L. H. (1982). Motivating students to make conjectures and proofs in secondary school geometry. Mathematics Teacher, 75, 447-451.

     Dennis, J. R. (1978). Computer classification of triangles and quadrilaterals - A challenging application. Mathematics Teacher, 71, 452-458.

     Giamati, C. (1995). Conjectures in geometry and The Geometer's Sketchpad. Mathematics Teacher, 88, 456-458.

     Wills, H., III. (1987). Revisiting the interior angles of polygons. Mathematics Teacher, 80, 632-634.