Quantitative Analysis and Visualization Regarding Interactive Learning with a Digital Library in Computer Science (Poster). - Ghaleb Abdulla; Winfield S. Heagy; Edward A. Fox (ACM DL, 1997)

Problem resolution support for free flight operations. - Daniel B. Kirk; Winfield S. Heagy; Michael J. Yablonski (IEEE Trans. Intell. Transp. Syst., 2001)