| article html file updated | 9 February 2020 10:40 CET | Update | https://www.mdpi.com/2077-0375/8/2/17 |
| article html file updated | 1 October 2019 20:04 CEST | Update | - |
| article html file updated | 1 May 2019 09:58 CEST | Update | - |
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| article html file updated | 27 June 2018 06:31 CEST | Update | - |
| article html file updated | 21 March 2018 16:12 CET | Original file | - |
| article xml uploaded. | 21 March 2018 16:11 CET | Original file | https://www.mdpi.com/2077-0375/8/2/17/xml |
| article pdf uploaded. | 21 March 2018 16:11 CET | Version of Record | https://www.mdpi.com/2077-0375/8/2/17/pdf |
