| article html file updated | 8 February 2020 03:34 CET | Update | https://www.mdpi.com/2077-0375/7/2/23 |
| article html file updated | 24 September 2019 07:34 CEST | Update | - |
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| article html file updated | 29 June 2017 11:37 CEST | Update | - |
| article html file updated | 13 April 2017 14:30 CEST | Original file | - |
| article xml uploaded. | 13 April 2017 14:28 CEST | Update | https://www.mdpi.com/2077-0375/7/2/23/xml |
| article pdf uploaded. | 13 April 2017 14:28 CEST | Version of Record | https://www.mdpi.com/2077-0375/7/2/23/pdf |
