Daniele Mundici. A lower bound for the complexity of Craig's interpolants in sentential logic. Arch. Math. Log., 23(1):27-36, 1983. [doi]
@article{Mundici83,
title = {A lower bound for the complexity of Craig's interpolants in sentential logic},
author = {Daniele Mundici},
year = {1983},
doi = {10.1007/BF02023010},
url = {http://dx.doi.org/10.1007/BF02023010},
researchr = {https://researchr.org/publication/Mundici83},
cites = {0},
citedby = {0},
journal = {Arch. Math. Log.},
volume = {23},
number = {1},
pages = {27-36},
}