John Staples. Truth in constructive metamathematics. Notre Dame Journal of Formal Logic, 19(3):489-494, 1978. [doi]
@article{Staples78-0,
title = {Truth in constructive metamathematics},
author = {John Staples},
year = {1978},
doi = {10.1305/ndjfl/1093888413},
url = {http://dx.doi.org/10.1305/ndjfl/1093888413},
researchr = {https://researchr.org/publication/Staples78-0},
cites = {0},
citedby = {0},
journal = {Notre Dame Journal of Formal Logic},
volume = {19},
number = {3},
pages = {489-494},
}