| article html file updated | 8 February 2020 02:32 CET | Update | https://www.mdpi.com/2313-5778/1/2/7 |
| article html file updated | 4 May 2019 04:24 CEST | Update | - |
| article html file updated | 13 April 2017 05:09 CEST | Update | - |
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| article html file updated | 30 March 2017 09:24 CEST | Update | - |
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| article html file updated | 30 March 2017 09:24 CEST | Original file | - |
| article xml uploaded. | 30 March 2017 09:23 CEST | Original file | https://www.mdpi.com/2313-5778/1/2/7/xml |
| article pdf uploaded. | 30 March 2017 09:23 CEST | Version of Record | https://www.mdpi.com/2313-5778/1/2/7/pdf |
