1. Birtwistle, G.M., Dahl, O.-J., Myhrhaug, B., Nygaard, K.: Simula Begin. Studentlitteratur (Lund, Sweden), Bratt Institut fuer neues Lernen (Goch, FRG), Chartwell-Bratt Ltd (Kent, England) (1979)
2. Chakravarty, M.M.T., Keller, G., Jones, S.L.P., Marlow, S.: Associated types with class. In: Palsberg, J., Abadi, M. (eds.) POPL, pp. 1–13. ACM Press, New York (2005)
3. Lecture Notes in Computer Science;T. Coquand,2003
4. Damas, L., Milner, R.: Principal type schemes for functional programs. In: POPL, Albuquerque, New, Mexico, pp. 207–212 (1982)
5. Grégoire, B., Leroy, X.: A compiled implementation of strong reduction. In: ICFP 2002, pp. 235–246. ACM Press, New York (2002)