| article html file updated | 9 February 2020 10:21 CET | Update | https://www.mdpi.com/2227-7099/6/1/18 |
| article html file updated | 1 October 2019 18:17 CEST | Update | - |
| article html file updated | 1 May 2019 10:39 CEST | Update | - |
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| article html file updated | 27 March 2018 12:35 CEST | Update | - |
| article html file updated | 19 March 2018 10:18 CET | Original file | - |
| article xml uploaded. | 19 March 2018 10:17 CET | Original file | https://www.mdpi.com/2227-7099/6/1/18/xml |
| article pdf uploaded. | 19 March 2018 10:17 CET | Version of Record | https://www.mdpi.com/2227-7099/6/1/18/pdf |
