William J. Mitchell. On the Hamkins approximation property. Annals of Pure and Applied Logic, 144(1-3):126-129, 2006. [doi]
@article{Mitchell06:4,
title = {On the Hamkins approximation property},
author = {William J. Mitchell},
year = {2006},
doi = {10.1016/j.apal.2006.05.005},
url = {http://dx.doi.org/10.1016/j.apal.2006.05.005},
researchr = {https://researchr.org/publication/Mitchell06%3A4},
cites = {0},
citedby = {0},
journal = {Annals of Pure and Applied Logic},
volume = {144},
number = {1-3},
pages = {126-129},
}