| article html file updated | 11 February 2020 22:08 CET | Update | https://www.mdpi.com/1996-1073/12/6/990 |
| article html file updated | 16 October 2019 14:07 CEST | Update | N/A |
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| article html file updated | 14 March 2019 08:47 CET | Original file | N/A |
| article pdf uploaded. | 14 March 2019 08:45 CET | Version of Record | https://www.mdpi.com/1996-1073/12/6/990/pdf |
| article xml uploaded. | 14 March 2019 08:45 CET | Update | https://www.mdpi.com/1996-1073/12/6/990/xml |
| article xml file uploaded | 14 March 2019 08:45 CET | Original file | N/A |