Paul Shafer. 0. Arch. Math. Log., 51(3-4):407-423, 2012. [doi]
@article{Shafer12-0,
title = {0},
author = {Paul Shafer},
year = {2012},
doi = {10.1007/s00153-012-0269-8},
url = {http://dx.doi.org/10.1007/s00153-012-0269-8},
researchr = {https://researchr.org/publication/Shafer12-0},
cites = {0},
citedby = {0},
journal = {Arch. Math. Log.},
volume = {51},
number = {3-4},
pages = {407-423},
}