www.atoz.lu/media/atoz-insights-august-2023?utm
www.loyensloeff.com/insights/news–events/news/luxembourg-ratifies-amendment-to-double-tax-treaty-with-germany/
Update:
www.loyensloeff.com/insights/news–events/news/luxembourg-ratifies-amendment-to-double-tax-treaty-with-germany/
www.atoz.lu/media/new-protocol-Luxembourg-Germany-DTT-2024