| article html file updated | 9 February 2020 01:15 CET | Update | https://www.mdpi.com/2312-7481/4/1/2 |
| article html file updated | 29 September 2019 11:55 CEST | Update | N/A |
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| article html file updated | 18 April 2019 04:01 CEST | Update | N/A |
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| article html file updated | 26 December 2017 09:45 CET | Original file | N/A |
| article xml uploaded. | 26 December 2017 09:43 CET | Update | https://www.mdpi.com/2312-7481/4/1/2/xml |
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| article pdf uploaded. | 26 December 2017 09:43 CET | Version of Record | https://www.mdpi.com/2312-7481/4/1/2/pdf |
