Study with 600+ references:https://www.researchgate.net/publication/349302406_Studie_zum_Ursprung_der_Coronavirus-Pandemie
Unusual Features of the SARS-CoV-2 Genome Suggesting Sophisticated Laboratory Modification Rather Than Natural Evolution and Delineation of Its Probable Synthetic Route:https://zenodo.org/record/4028830
SARS-CoV-2 Is an Unrestricted Bioweapon: A Truth Revealed through Uncovering a Large-Scale, Organized Scientific Fraud:https://zenodo.org/record/4073131
Here is an GER-ENG translation (via Google) of the first PDF you linked to (Researchgate, Studie zum Ursprung der Coronavirus-Pandemie ):
https://www.pdfdrive.com/study-on-the-origin-of-the-coronavirus-pandemic-roland-wiesendanger-february-2021-e200977155.html