@article{1183391446,
author = {Helmer, Olaf and Oppenheim, Paul},
title = {A Syntactical Definition of Probability and of Degree of Confirmation},
journal = {J. Symbolic Logic},
volume = {10},
number = {1},
year = {1945},
pages = { 25-60},
language = {en},
url = {http://dml.mathdoc.fr/item/1183391446}
}
Helmer, Olaf; Oppenheim, Paul. A Syntactical Definition of Probability and of Degree of Confirmation. J. Symbolic Logic, Tome 10 (1945) no. 1, pp. 25-60. http://gdmltest.u-ga.fr/item/1183391446/