Mike Prest, Ravi Rajani. Pure-injectivity and model theory for G-sets. Journal of Symbolic Logic, 74(2):474-488, 2009. [doi]
@article{PrestR09,
title = {Pure-injectivity and model theory for G-sets},
author = {Mike Prest and Ravi Rajani},
year = {2009},
url = {http://projecteuclid.org/euclid.jsl/1243948323},
researchr = {https://researchr.org/publication/PrestR09},
cites = {0},
citedby = {0},
journal = {Journal of Symbolic Logic},
volume = {74},
number = {2},
pages = {474-488},
}