| article html file updated | 7 February 2020 20:11 CET | Update | https://www.mdpi.com/1996-1073/10/1/12 |
| article html file updated | 22 September 2019 14:31 CEST | Update | - |
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| article html file updated | 23 December 2016 09:40 CET | Original file | - |
| article xml uploaded. | 23 December 2016 09:39 CET | Original file | https://www.mdpi.com/1996-1073/10/1/12/xml |
| article pdf uploaded. | 23 December 2016 09:39 CET | Version of Record | https://www.mdpi.com/1996-1073/10/1/12/pdf |
