A model of the mechanical design process based on empirical data. - David G. Ullman; Thomas G. Dietterich; Larry A. Stauffer (Artif. Intell. Eng. Des. Anal. Manuf., 1988)

The importance of drawing in the mechanical design process. - David G. Ullman; Stephen Wood; David Craig (Comput. Graph., 1990)

Taxonomy for classifying engineering decision problems and support systems. - David G. Ullman; Bruce D'Ambrosio (Artif. Intell. Eng. Des. Anal. Manuf., 1995)