| article html file updated | 9 February 2020 00:35 CET | Update | https://www.mdpi.com/1996-1073/10/12/2177 |
| article html file updated | 29 September 2019 08:14 CEST | Update | - |
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| article html file updated | 19 December 2017 15:12 CET | Original file | - |
| article xml uploaded. | 19 December 2017 15:11 CET | Original file | https://www.mdpi.com/1996-1073/10/12/2177/xml |
| article pdf uploaded. | 19 December 2017 15:11 CET | Version of Record | https://www.mdpi.com/1996-1073/10/12/2177/pdf |
