| article html file updated | 9 February 2020 02:07 CET | Update | https://www.mdpi.com/2225-1154/6/1/2 |
| article html file updated | 2 May 2019 04:10 CEST | Update | - |
| article html file updated | 18 April 2019 02:16 CEST | Update | - |
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| article html file updated | 26 March 2018 15:37 CEST | Update | - |
| article html file updated | 5 January 2018 12:55 CET | Original file | - |
| article xml uploaded. | 5 January 2018 12:53 CET | Update | https://www.mdpi.com/2225-1154/6/1/2/xml |
| article pdf uploaded. | 5 January 2018 12:53 CET | Version of Record | https://www.mdpi.com/2225-1154/6/1/2/pdf |
