A solid modelling system: FREEDOM-II. - Fujio Yamaguchi; Toshiya Tokieda (Comput. Graph., 1983)

A Unified Algorithm for Boolean Shape Operations. - Fujio Yamaguchi; Toshiya Tokieda (IEEE Computer Graphics and Applications, 1984)

A Solid Modeler with a 4 x 4 Determinant Processor. - Fujio Yamaguchi; Toshiya Tokieda (IEEE Computer Graphics and Applications, 1985)