https://biblioscout.net/article/10.33196/ziir201403019906
https://doi.org/10.33196/ziir201403019906
https://biblioscout.net/?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=ziir&rft.atitle=OLG+Hamm%2C+Urteil+19.11.2013%2C+4+U+65%2F13+%E2%80%93+%E2%80%9Ebutton-in%E2%80%9C-L%C3%B6sung&rft.volume=2014&rft.issue=3&rft.spage=199&rft.epage=199&rft.issn=2306-4900&rft_id=info:doi/10.33196/ziir201403019906