1. Type-free compiling of parametric types;Amadio,1986
2. Towards a wide spectrum language to support program specification and program development;Bauer;SIGPLAN Notices,1978
3. Programming with modules as typed functional programming;Burstall,1984
4. Putting theories together to make specifications;Burstall,1977
5. A semantics of multiple inheritance;Cardelli,1984