Csiszár Imre: Information theory. Coding theorems for discrete memoryless systems - Disquisitiones mathematicae Hungaricae 12. (Budapest, 1986)
DISQUISITIONES MATHEMATICAE HUNGARICAE A COMMISSIONE MATHEMATICORUM HUNGARORUM REDACTAE IN AEDIBUS ACADEMIAE SCIENTIARUM HUNGARICAE BUDAPESTINI MCMLXXXVI