@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/