Jan von Plato, Annika Siders. Normal Derivability in Classical Natural Deduction. Rew. Symb. Logic, 5(2):205-211, 2012. [doi]
@article{PlatoS12,
title = {Normal Derivability in Classical Natural Deduction},
author = {Jan von Plato and Annika Siders},
year = {2012},
doi = {10.1017/S1755020311000311},
url = {http://dx.doi.org/10.1017/S1755020311000311},
researchr = {https://researchr.org/publication/PlatoS12},
cites = {0},
citedby = {0},
journal = {Rew. Symb. Logic},
volume = {5},
number = {2},
pages = {205-211},
}