Documentation for a Model: A Hierarchical Approach. - Saul I. Gass; Karla L. Hoffman; Richard Henry Frymuth Jackson; Lambert S. Joel; Patsy B. Saunders (Commun. ACM, 1981)

Concepts of model confidence. - Saul I. Gass; Lambert S. Joel (Comput. Oper. Res., 1981)