Dewar, Robert; Grand, Arthur; Liu, Cheng; Schonberg, Edmond; and Schwartz, Jacob "SETL as a tool for generation of quality software" in "Constructing quality software" pp353-366

Hibbard, P. (1978) Hibbard, P. G. and Schuman, S. A. (Eds.), Proc. IFIP working conference on constructing quality software, Elsevier North-Holland, Inc., New York, 1978  

Languages mentioned SETL {1970} Set based programming language