@article{doi:,
author = {Ziegler, Karl and Gregor, Mendel and Diriker, Mevsim and Frederich, Markus},
title = {Endoscopic Ultrasonography in the Achalosia},
journal = {South Clin Ist Euras},
volume = {1},
number = {1},
pages = {15-18},
year = {1990},
doi = {},
note ={doi: },

URL = {https://dx.doi.org/},
eprint = {https://dx.doi.org/}
}