Philosophy
Philosophy
JOHNSON, ALEXANDER BRYAN.
A Treatise on Language. Edited..Berkeley a. Los Angeles, University of California Press, 1947.
HILBERT, D. und W. ACKERMANN.
Grundzüge der theoretischen Lo..Berlin, Göttingen..., Springer-Verlag, 1959.
SMULLYAN, RAYMOND M.
Languages in which Self-refere..(No place), The Association for Symbolic Logic, Inc., 1957.