@article{BorgettoTomlinMaxetal.2021, author = {Bernhard Borgetto and George S. Tomlin and Susanne Max and Brigitte Elisabeth Gantschnig and Andrea Pfingsten}, title = {Die Forschungspyramide. Teil 2: Methodologische Grundlagen: Kausalit{\"a}t und externe Evidenz}, journal = {Ergoscience}, volume = {12}, number = {3}, pages = {90 -- 101}, doi = {10.1007/978-3-662-58314-2_58}, year = {2021}, }