1. Blends in geometric modelling;Woodwark,1987
2. An extended rounding operation for modeling solids with free-form surfaces;Chiyokura,1987
3. Constant-radius blending in solid modeling;Rossignac;Comput. Mech. Eng.,1984
4. Constant-radius blending in surface modelling;Choi;Comput.-Aided Des.,1989
5. Rolling ball blends in solid modelling;Várady,1989