| article html file updated | 12 February 2020 04:26 CET | Update | https://www.mdpi.com/2306-5729/4/2/51 |
| article html file updated | 18 October 2019 02:51 CEST | Update | - |
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| article html file updated | 10 April 2019 23:59 CEST | Original file | - |
| article pdf uploaded. | 10 April 2019 16:26 CEST | Updated version of record | https://www.mdpi.com/2306-5729/4/2/51/pdf |
| article xml uploaded. | 10 April 2019 16:26 CEST | Update | https://www.mdpi.com/2306-5729/4/2/51/xml |
| article xml file uploaded | 10 April 2019 16:26 CEST | Update | - |
| article xml file uploaded | 10 April 2019 16:05 CEST | Original file | - |