@article{1093957736,
author = {K\"ung, Guido},
title = {Concrete and abstract properties.},
journal = {Notre Dame J. Formal Logic},
volume = {5},
number = {1},
year = {1964},
pages = { 31-36},
language = {en},
url = {http://dml.mathdoc.fr/item/1093957736}
}
Küng, Guido. Concrete and abstract properties.. Notre Dame J. Formal Logic, Tome 5 (1964) no. 1, pp. 31-36. http://gdmltest.u-ga.fr/item/1093957736/