Petar Iliev. On semantically labelled syntax trees and the non-existence of certain Sahlqvist formulae. Logic Journal of the IGPL, 31(3):483-509, May 2023. [doi]
@article{Iliev23,
title = {On semantically labelled syntax trees and the non-existence of certain Sahlqvist formulae},
author = {Petar Iliev},
year = {2023},
month = {May},
doi = {10.1093/jigpal/jzac044},
url = {https://doi.org/10.1093/jigpal/jzac044},
researchr = {https://researchr.org/publication/Iliev23},
cites = {0},
citedby = {0},
journal = {Logic Journal of the IGPL},
volume = {31},
number = {3},
pages = {483-509},
}