Jürgen Hauck. x, y). Math. Log. Q., 31(21-23):357-362, 1985. [doi]
@article{Hauck85,
title = {x, y)},
author = {Jürgen Hauck},
year = {1985},
doi = {10.1002/malq.19850312106},
url = {http://dx.doi.org/10.1002/malq.19850312106},
researchr = {https://researchr.org/publication/Hauck85},
cites = {0},
citedby = {0},
journal = {Math. Log. Q.},
volume = {31},
number = {21-23},
pages = {357-362},
}