Jan Foniok, Claude Tardif. Adjoint functors and tree duality. Discrete Mathematics & Theoretical Computer Science, 11(2):97-110, 2009. [doi]
@article{FoniokT09,
title = {Adjoint functors and tree duality},
author = {Jan Foniok and Claude Tardif},
year = {2009},
url = {http://www.dmtcs.org/dmtcs-ojs/index.php/dmtcs/article/view/987},
researchr = {https://researchr.org/publication/FoniokT09},
cites = {0},
citedby = {0},
journal = {Discrete Mathematics & Theoretical Computer Science},
volume = {11},
number = {2},
pages = {97-110},
}