1. On Measures of Information and Their Characterizations;Aczél,1975
2. “Why the Shannon and Hartley entropies are ‘natural’.”;Aczél;Advances in Applied Probability,1974
3. “Measuring the internal information exchange in a system.”;Ashby;Cybernetica,1965
4. “Two tables of identities governing information flows within large systems.”;Ashby;ASC Communications,1969
5. “Information flows within co-ordinated systems.”;Ashby,1970