Burstall, R.M. & Lampson, B. "A Kernel Language for Abstract Data Types and Modules"

Kahn, G. D. B. MacQueen & G. Plotkin, Eds. (1984) Kahn, G. D. B. MacQueen & G. Plotkin, Eds. "Semantics of Data Types", LNCS 173, Springer 1984  

Languages mentioned Pebble {1984}