Robey, B. L., P. K. Fink, S. Venkatesan, C. L. Redfield, and J. W. Ferguson. “DRAIR ADVISER: A Knowledge-Based System Ofr Materiel-Deficiency Analysis”. AI Magazine, Vol. 15, no. 2, June 1994, p. 67, doi:10.1609/aimag.v15i2.1091.