Edit April 20th, 2021: thanks to Christos Petrou I found a bug in my code. I was considering both "Section" and "Collection" articles as Speical Issue. The whole analysis has been changed to accommodate the new data. I also acknowledged in the text the arguments of Volker Beckmann, who develops a coherent defense of MDPI…
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Funded by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy - EXC 2075 - 390740016