1. “Natural language input for a computer problem-solving system,”;Bobrow,1968
2. “Applications of meta level knowledge to the construction and use of large knowledge bases,”;Davis,1981
3. “The simulation of verbal learning behavior,”;Feigenbaum,1963
4. “On generality and problem solving: A case study using the DENDRAL program,”;Feigenbaum,1971
5. “Understanding written problem instructions,”;Hayes,1974