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| article pdf uploaded. | 21 January 2020 09:26 CET | Updated version of record | https://www.mdpi.com/2227-9717/8/1/51/pdf |
| article xml uploaded. | 21 January 2020 09:26 CET | Update | https://www.mdpi.com/2227-9717/8/1/51/xml |
| article xml file uploaded | 21 January 2020 09:26 CET | Update | N/A |
| article html file updated | 9 January 2020 08:25 CET | Update | N/A |
| article html file updated | 8 January 2020 06:58 CET | Original file | N/A |
| article pdf uploaded. | 8 January 2020 06:56 CET | Updated version of record | https://www.mdpi.com/2227-9717/8/1/51/pdf-vor |
| article xml file uploaded | 8 January 2020 06:56 CET | Update | N/A |
| article pdf uploaded. | 2 January 2020 07:48 CET | Version of Record | https://www.mdpi.com/2227-9717/8/1/51/pdf-vor |
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