1. On Measures of Information and Their Characterizations;Aczél,1975
2. Why the Shannon and Hartley entropies are ‘natural’;Aczél;Adv. in Appl. Probab.,1974
3. Two tables of identities governing information flows within large systems;Ashby;ASC Comm.,1969
4. Information flows within co-ordinated systems;Ashby,1970
5. Systems and their informational measures;Ashby,1972