| article html file updated | 9 February 2020 16:03 CET | Update | https://www.mdpi.com/2313-0105/4/2/22 |
| article html file updated | 3 October 2019 04:15 CEST | Update | N/A |
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| article html file updated | 25 June 2018 11:51 CEST | Update | N/A |
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| article html file updated | 2 May 2018 13:35 CEST | Original file | N/A |
| article xml uploaded. | 2 May 2018 13:25 CEST | Update | https://www.mdpi.com/2313-0105/4/2/22/xml |
| article pdf uploaded. | 2 May 2018 11:24 CEST | Version of Record | https://www.mdpi.com/2313-0105/4/2/22/pdf |
| article xml file uploaded | 2 May 2018 11:24 CEST | Original file | N/A |
