Conceptual Schemas with Abstractions: Making Flat Conceptual Schemas More Comprehensible. - L. J. Campbell; Terry A. Halpin; Henderik Alex Proper (Data Knowl. Eng., 1996)

The development and evaluation of a three-dimensional ultrasound-guided breast biopsy apparatus. - Kathleen J. M. Surry; Wendy L. Smith; L. J. Campbell; Gregory R. Mills; Dónal B. Downey; Aaron Fenster (Medical Image Anal., 2002)