| article html file updated | 9 February 2020 02:53 CET | Update | https://www.mdpi.com/2077-0375/8/1/3 |
| article html file updated | 2 May 2019 02:36 CEST | Update | - |
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| article html file updated | 26 March 2018 17:09 CEST | Update | - |
| article html file updated | 12 January 2018 15:58 CET | Original file | - |
| article xml uploaded. | 12 January 2018 15:57 CET | Original file | https://www.mdpi.com/2077-0375/8/1/3/xml |
| article pdf uploaded. | 12 January 2018 15:57 CET | Version of Record | https://www.mdpi.com/2077-0375/8/1/3/pdf |
