| article html file updated | 8 February 2020 06:03 CET | Update | https://www.mdpi.com/2218-1989/7/2/19 |
| article html file updated | 24 September 2019 20:56 CEST | Update | - |
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| article html file updated | 28 June 2017 13:51 CEST | Update | - |
| article html file updated | 22 May 2017 04:19 CEST | Update | - |
| article html file updated | 17 May 2017 12:16 CEST | Original file | - |
| article xml uploaded. | 17 May 2017 12:15 CEST | Original file | https://www.mdpi.com/2218-1989/7/2/19/xml |
| article pdf uploaded. | 17 May 2017 12:15 CEST | Version of Record | https://www.mdpi.com/2218-1989/7/2/19/pdf |
