TY - JFULL AU - Dipl.-Wirtsch.-Ing. Ralph Appel AU - Dr.-Ing. Volker Kefer JF - VDI nachrichten DO - 10.51202/0042-1758-2021-22 IS - 22 LA - de PY - 2021 UR - https://doi.org/10.51202/0042-1758-2021-22 VL - 75 Y2 - 29.03.2024 ER -