[1] M. KATĚTOV:
Extended Shannon entropies I. Czechoslovak Math. J. 33 (108) (1983), 564-601.
MR 0721088
[2] M. KATĚTOV:
Extended Shannon entropies II. Czechoslovak Math. J. 35 (110) (1985), 565-616
MR 0809043
[3] E. C. POSNER E. R. RODEMICH H. RUMSEY, Jr.:
Epsilon entropy of stochastic processes. Ann. Math. Statist. 38 (1967), 1000-1020.
MR 0211457
[4] A. RÉNYI:
Dimension, entropy and information. Trans. 2nd Prague Conf. Information Theory, pp. 545-556 Prague, 1960.
MR 0129049