Paper  doi  bibtex   

@article{putnam_what_1975,
	title = {What is mathematical truth?},
	volume = {2},
	issn = {0315-0860},
	url = {http://www.sciencedirect.com/science/article/pii/0315086075901160},
	doi = {10.1016/0315-0860(75)90116-0},
	number = {4},
	urldate = {2013-12-02},
	journal = {Historia Mathematica},
	author = {Putnam, Hilary},
	month = nov,
	year = {1975},
	pages = {529--533}
}