Marcella A. Chamberlain Ajay Joneja Tien-Chien Chang Protrusion-features handling in design and manufacturing planning. 19-28 1993 25 Computer-Aided Design 1 http://dx.doi.org/10.1016/0010-4485(93)90062-S db/journals/cad/cad25.html#ChamberlainJC93