@data{vswg.2020251.121019,
author = {Scheltjens, Werner},
publisher = {ZBW - Leibniz Informationszentrum Wirtschaft},
title = {tetradas},
year = {2020},
version = {1},
url = {https://journaldata.zbw.eu/dataset/tetradas},
keywords = {N01,N73},
doi = "10.15456/vswg.2020251.121019" 
}