Stefik, M., Bobrow, D.G., and Kahn, K. "Integrating access-oriented programming into a multiparadigm environment"

Peterson, G.E. (1987) Peterson, G.E. (ed), Object-Oriented Computing, Volume 2: Implementations, IEEE Computer Society Press, 1987   D.G. Bobrow

Languages mentioned LOOPS {1983} Lisp Object-Oriented Programming System