This list includes several books/articles with in-depth discussion of the usefulness of case studies in teaching/learning.
--Hutchings, Pat. “Cases about College Teaching and Learning: A Picture of Emerging Practice.” Ch. 1 of Using Cases To Improve College Teaching: A Guide to More Reflective Practice. Washington, D.C.: American Association of Higher Education, 1993.
--Stinson, John E. and Richard G. Milter. “Problem-Based Learning in Business Education: Curriculum Design and Implementation Issues.” New Directions for Teaching and Learning 68 (Winter 1996), 33-42.
--Silverman, Rita, William M. Welty, and Sally Lyon. Case Studies for Teacher Problem Solving, 2nd edition. New York: McGraw-Hill, 1996.